I put systems like this together for the budget minded all the time. The budget you have is what I will start with, $379 total (plus tax) plus the same installation stuff you'll need as well, that adds $73 for a total of $452 plus tax (did not bother with the Kenwood amp, not one of the better product in this selection, I would purchase either the Recoil or the Pioneer )
That pioneer amp is a great amp, I've used it a number of builds, solid performer, on
Amazon for $37.49 less.
$142.50
Amazon product ASIN B07N8HPTMC
If you really need a pair of earbuds, the ones offered for "free" (not really free) and a better set can be had for around $15:
Amazon product ASIN B0170RBJ9Q
I use Pioneer speakers in my current ride (the Z series at $299 a pair), and the ones you've selected are on a par with the Kickers, but there is a hitch. If you run the front doors and the dash together, you lose the ability to control the volume for everything up front except the front to back and the balance as the amp will see each corner (Left doo/dash - right door/dash) as a single speaker, not good, especially if one is beaming off the dash and the other is in the lower door. No benefit in sound when you have no control over which of the fronts is louder. Combining any of the channels as one, no bueno.
Skip the dash and get these NVX speakers front and rear as they will sound better, much better in my experience, than any of the speakers you have selected. They use Similar polypropylene cones larger magnet motor structures and the tweeter section is handled by a much better silk dome. The NVX line has a good, better, best. The X series is their top of the line, let's go with the mid priced line, in budget and better than all the speakers you have put together;
For the 6x9's and right now available directly from NVX:
$99.99
Product Details: 6" x 9" V Series 2-way Coaxial Car Speakers Power Handling: Peak: 900 watts per pair / 450 watts each RMS: 300 watts per pair / 150 watts each Polypropylene cone material Nitrile Butadiene Rubber NBR speaker surround 1" Silk Dome Tweeters CEA-2031 compliant: Yes 1.5" Voice coil...
nvx.com
Up front you have two options, a coaxial for the doors, right now available directly at $25 off what they sell on
Amazon for:
$79.99
Product Details: 6-1/2" NVX V-Series 2-way Coaxial Car Speakers Power Handling: Peak: 600 watts per pair / 300 watts each RMS: 200 watts per pair / 100 watts each Polypropylene cone material Nitrile Butadiene Rubber NBR speaker surround 1" Silk Dome Tweeters CEA-2031 compliant 1.5" Voice coil...
nvx.com
With the money saved from the dash speakers and staying with the familiar trusted retailer theme, you can pick up the installation goods. This is one of the least expensive and bonafide pure copper installation skits, I've purchased them, several times. Don't get ****** in by lesser costing 4 gauge kits, they are ALL most certainly CCA (copper clad aluminum) wire and not worth the $15-$20 difference in savings, cheap is cheap but fires are expensive! I've done the homework for you. If there is another, less expensive kit, that is OFC copper, it's likely be a matter of a dollar or two, this is a good kit.
$49.99 (less 10% coupon) $44.99
Amazon product ASIN B0C8V972Z7
Line out converter from the OEM HU to the Amplifier:
$19
Amazon product ASIN B09MTHDJ7D
You get one 17" RCA, you'll need another RCA, these are decent and since they are a different color, you'll be able to tell which is for the front and which is for the rear channels.
$10
Amazon product ASIN B07TBS624D
Total: $396.47
(add $15 if you really need the ear buds!)
And for almost the same, (only $40 more, than the v series and usually $80 more) go with the x series with carbon fiber cones and German silk dome tweeters!
6x9's are $40 off
Product Details: 6" x 9" NVX X-Series 2-way Coaxial Car Speakers Power Handling: Peak: 900 watts per pair / 450 watts each RMS: 300 watts per pair / 150 watts each Lightweight Carbon Fiber cone Rubber speaker surround 1" Silk Dome German-made tweeters CEA-2031 compliant 1-3/8" Voice coil Woven...
nvx.com
6.5's
Product Details: 6-1/2" NVX X-Series 2-way Coaxial Car Speakers Power Handling: Peak: 600 watts per pair / 300 watts each RMS: 200 watts per pair / 100 watts each Lightweight Carbon Fiber cone Rubber speaker surround 1" Silk Dome German-made tweeters CEA-2031 compliant 1-3/16" Voice coil Woven...
nvx.com
Going with the X-series blows your original selections out of the water and is still less than what you would have needed to spend for your original selection. One of the benefits of using my 40+ years in audio in forums like this is I am not a seller and my motivation is to give you information that provides you with better options that don't cost you more and will perform MUCH better.
You don't have to trust me here but the selections and the system I have put together here will outperform the 6 speaker set up that you have put together, every day of the week and twice on Sundays!