Are you running these highs off an amplifier? If so, i'd go with 6.5 in the front. (Handle more power) If not, 5.25 are fine. Everyone will have there own opinion, Maybe take a look at 5.25 and 6 by 9 pioneer Revs. Possibly Hifonic Zues 6 by 9s are nice, i bought some to play around with, have a neat tweeter protector, and handle 110 rms.(These are also $100 shipped!!) Along with a L.E.D if you like that. A subwoofer brand is up too you, Kicker, JL Audio, RE, and Digital Designs are all brands i liked.
Note: I have an extra U.S. Merlin Amp MD3D 2000 RMS i may sell too if you want some power.
3.4 ZZP Modular Pulley, K and N FIPK, 180 t-stat, DHP V 1.0 PCM, Autolite 104's, Taylor 8mm Red Wires, SSAC Headers, Dynomax Tips, High-flow mufflers, Drilled and Slated Rotors, 13.5 Jl audio w6's, U.S. Amp MD3D, Lanzar 500x2, Blue Underglow, 3 Optima Red top batteries 
