You'll need a 2 channel for those components. Don't go overboard on power, look for something in the 50 - 100 watt / channel range from a good amp maker.
Personally, I like the old black Orion amps for highs (you can find them on Ebay for dirt cheap), but that's just my personal bias. I just spotted a brand new 240 GX on there for a buy-it-now of $100, starting bid of $75.
Just pick a brand you like and get their mid-powered 2 channel amp.