wel 1st off alll the w3's are better subs hands down. 2nd i'm a.ssuming you mean the 500/1 cuz if your tlaking about jl amps there is no such thing as a 500/2. if you try to go with 3 w0's with the 500/1 you might be able to make it work if it's the right impendence. but trying to make 2 w0's work with the 500/1 that'll be too much power and you'd have to turn down the gain.
if you do 2 w3's to that 500/1 it'll work perfect. then you can always add one more w3 witha 250/1 and that'll work great also.
btw whats your budget, i know i can find you better sh*t if your willing to spend jl prices