I have 2 12" 4 ohm cvx kicker subs 750watt rms. What amp could I use to push the subs the best.?

this amp right here should be good. http://www.sonicelectronix.com/item_14639_Power+Acoustik+BAMF-2000-1D+-BAMF2000-1D-.html

It's really up to you, what brand your prefer. obviously get a decent brand like rockford fosgate, jl audio, kicker and get an amp that puts out 1500-1600 watts rms or 2 amps that put out 750-800 watts rms each. If they are single voice coils then you need a single amp that is 2 ohm stable or if they are DVC then you need an amp that is 1 ohm stable.

you should get at least a amp that is 1 ohm mono you could set up the subs from 4ohm to 1ohm ...i have a cadence zrs 8000d 1ohm mono 4500 watts pushing 2 of this subs in a ported box they hit pretty strong bass

You can use memphis amp for great quality.

kicker zx1500.1 will be the best 750 rms x 2 =1500 just dont have the gain over half,

whatever the PEAK power for the subs are combined divide that by 2 and find an amp within 200w of that. running the subs at rms power will be the best especially if you buy a good amp because it will peak out at what the subs peak are and you could potentially blow them. i do have an amp i suggest tho. http://www.memphiscaraudio.com/products/amplifiers/class-d-power-reference-amplifiers/ (the pr1.1000) i suggest memphis amps over kicker because i know 2 people with kicker amps that both have trouble with them overheating.