If you need to go through
Crutchfield, then you should get what they can offer, cross the dash speakers at 200HZ.
Other options:
With that configuration, I would skip the rear pillars altogether, limited power so concentrate efforts on where you can get the most out of that 4-channel amp (more on that later).
Find a decent, high-efficiency 6.5" for the front doors, coaxial if you must, and whatever you can fit in the dash, set the HP filter on the dash speakers at 200Hz,
The pioneers are fine for that duty, but there are better options out there at close to the same price.
I would put these in the dash, HP filter at 200Hz.
$37.49 with coupon.
And a better option than utilizing the pillars would be to find a 2-ohm 6.5" option for the doors, as that amp outputs 90x2 at 2-ohms, better than 60x2 at 4-ohms.
Here's a decent
4-ohm option for the doors (2-ohm options coming up, retail source and budget dependent).
That's the budget end of what I'd do.
If you don't have to use
Crutchfield, other options will do much better, at about or slightly more than your current budget.
Let me know either way, and the budget will dive into the other options too.