Cool, thanks for the replies. The ones I like seem to have 3 so it should work out fine.

Heres another question. I plan to have the sub installed so I can remove it when need be. This means the amp will be a fixed install. I know you can set the deck to remote power on the amp. Do HUs have controls to turn the amp off full time, so I can pull the sub out. Or do I need a physical manual switch to kill the power to the sub full time?