I'm agonizing over my decision to purchase a 17" 2.0 c2d refurb imac from apple.com. It was 850.00 and it seems like a better deal than a tricked out mini with it's x1600 video card, 160gb 3.5" hd, and easily accessed memory. Screen size is what pushed me that way. I kinda like the oldskool imacs and it fits nicely on an anthrocart that is my main computer cart.
Still I keep thinking of the new 20"s...
But for my needs the 17" could be a killer computer. 17" screen and all.
I see they usually sell out quickly, so you have to check the store early in the morning if you want to find one.