What would be the best speakers to buy? I prefer rock, not a ton of bass.

I got Infinity reference rears 6/9's for a measly $40 on Ebay , (almost brand new, nary a scratch)which included shipping. Also 4" front Infinity. I'm well pleased, and the big black speakers in back windows add a nice touch.
Btw after market speakers dont fit, as they are way bigger at the base, so you have to hog out some plastic from shelf.

Infinity's all the way. I have a set of 6x9's in the back that i ripped out of a '93 caravan that went in, theyre skinny, so you dont have to worry about anything, and they have the "rich" bass, nice middles, and the beautiful highs.
I Reccomend them!
Bill