I watch 2 kicker amp for my kicker model. one is a kicker 600.1 and the other is 300.1 amps. Now the peak power on the subwoofer are 300W each (600W total), so the kicker 600.1 should be good right? The way i am looking at is 600w amps each sub will get 300W each running 2ohm?

I want a JL audio 1000/1 amp, those are around $600 on ebay. Well, I was searching around and I seen that the Kicker ZX1500.1 amp goes for about $200 cheaper. Are kickers good? Is the JL amp better even though it has less power, or am I just paying for the name?

JL is a better sounding amp, it simply can "control" the sub better. but it would require a very good system, and a very quite vehical to appreciate the difference. Also if you run a 4 ohm load i believe the JL actually might have more output, because kicker rated thiers at 2 ohms (i believe @ 4 it drops substantially). and JL is a constant power from 1.5-4 ohms. All in all if it were mt money i would likely go with the kicker. and save the $200 bucks for something that would make a more substantial difference. But if the rest of your system is perfect in your eyes (or should i say to your ears), then yes the jl will sound better..

On a side note, if you use the kicker into a 2 ohm load, that kind of power (1500RMS) would require some upgrades to your cars electrical system... the big three wire upgrade, and High output alternator would be required, or your lights would dim, and youd end up replacing these items anyway, because they would quickly wear out.