Figure about 35-40% off the list price is the street price, so don't freak out. The original Drake, for example (CST744S) can be had for $200-220 in white.
Take a look at Terry's prices and pictures from the link above, and see what you like the looks of. All of the Totos at the level of the Original Drake or above will flush fabulously. If you want a little more bowl wash, the Drake II (CST454CEFG) is excellent (around $340 in white) and looks a little more modern. In a one-piece, the Ultramax II is excellent (about $440).
We have two original Drakes, among others, and highly-recommend them to everyone. I think they are a Best Buy!!