will a 600.1 last with 2 jl wo 10's? i want it 2 last 4 years with no problems like overheating like it seems they may do. what ohm subs would i need if i got that amp. and r crossfire amps any good. some guy wantsto sell me a new 35x4 amp 2 run the subs until i can get a better amp. he wants 210, is that a bad deal, i know nothing about crossfire.