im pretty sure that i want to go with infinity kappa speakers to match my 463.7 front speakers that sound AWESOME. right now i have a plate made for 4 4's that i have 4 proaudio speakers in it, that sound alright, but 2 of them are blown. so im probably either going with 2 693.7i kappa 6x9s, or 4 42.7i kappa 4's. im kind of leaning towards the 4's sounding better, what do you all think?

Do some custom work and fit some 5 1/4" components in there.

4" speakers have almost no midbass. Most people would run dedicaded midbass' or get a larger woofer.