Looking at a hifonics z500d, I think its an older Zeus model. Wondering if it is a decent amp. It puts out 500x1 @ 2 ohms. My 12" alpine type-r is 500 watts rms so I thought this would be a good match. the sub will be wired for a 2 ohm load. Any comments on the z500d?? Other candidates for an amp is the z1000d which puts out 750x1 @ 2 ohms and the bx1000d which puts out 500x1 @ 2 ohms.