Whoa... $700-1500 is a lot!!!!
Anyway, if you don't want to invest too much money, then I'd suggest hitting your local Best Buy, Circuit City, Tweeter, etc and listening to some coaxials (2 or 3 way speakers). Try to power them with a deck that has the same power as yours. After you find the ones you like, you could either buy them there, at Crutchfield, or for even less online or at ebay.