Well, the factory speakers are just driving me nuts and I decided it's time to do up my sound system. I like kenwood's stuff and have a head unit with one set of pre-outs and 2 12" subs with a 450 watt subwoofer amp. I'm planning on getting kenwood excelon 4x6's and 6x9's for the front and rear.

Question is, what should I get for an amp? I'd like to have just one amp for everything and get rid of the 450W amp for just the sub.

 

Just get a 5 channel amp. the KAC 959 is a 5 channel 800watt amp which should easilly do what you need. I have two KAC 929s which are 1000 watt 2 channel amps and I absolutely love them. Check ebay, thats where I got mine and I only paid 50$ USD per amp.