m3's man because i have two 12's m3 only had memphis 16mca150 which 75 watt oneach channel and i could bet 15's not bragging though but alpine nice 2 i think cheaper than m3 i saw on
ebay for 2 brand m3 for 270 something, best of luck man
Sounds a bit biased... >_>
Type R's are superior, and will definitely get louder, and have a good reputation for a decent sound.
My recommendation is to get the Type R's, and build your own box to your trunk. It's not a difficult job, and someone here can always design one for you, all you would need to do is cut the wood and build it according to those specs.
As for an amp? I'd say the best amp for the price to power those (or the m3's for that matter) would be an Audioque 1200D, obtainable for $250 shipped, direct and brand new.
Do you have a head unit? If not, that is also a must. Or, if you prefer the stock look, Line Output Converters to allow amps to be run.
In addition, I wouldn't worry about the rear speakers - they don't factor into the sound you hear as much as the fronts. It's much better to save the money on rears, and get a good set of front speakers and an amp, while leaving the rears stock for slight fill.
Atm, a sub setup will run you approximately $500, factoring in materials costs.
A pair of comps, I'd say either the Phoenix Gold RSD's, or a pair of Image Dynamics comps would be best. The difference between them is the PG RSD's run $70 shipped, and the other runs about $180 shipped, if I remember correctly. So that could depend on how tight the budget is.
An amp to power those, you would need a decent 2 channel amp, or a 4 channel to bridge to them, for about 60 RMS to the PG, and 100 RMS to the ID. You have several options there - just avoid the low-end brands.
As I don't know if you need a head unit or not... I can't factor that in so much. But Pioneer, Kenwood, and Alpine all make decent HU's.