i'm planning on running 3 15 inch JL audio w0s. the guy at the audio store is trying to sell me a JL audio 500.1 v2 amp and i'm kind of doubtful that it will push enough power to my 3 15s. he says that the subs will get about 450 rms each..which also raises a doubt in my mind. would a 500.1 be enough for my 3 15s? if not, what amp should i look at? i'm trying to stay away from jl due to the price, but i like memphis but am unsure which amp would suit me best. any input would be appreciated. thanks!