Need help picking out an amp.?

Okay, so I have 2 12" Alpine Type R's (500w rms and 1500w peak) I have 1 Alpine 500w amp on each sub at the moment. I am looking for an affordable high powered amp to switch over too. I would like to buy 1 amp and hook both subs up to just the one amp. I have been looking for a new amp and have had some trouble trying to find one that will power them both really well. And another question they are dual voice coil subwoofers. With a new amp how would i want to hook them up? Thank you for all of your help.