I can vouch for the 20D. It is a very nice camera. The kit lens is not the best, but it still works very well. The 10D would be a good cheaper version, and you can find them used for a great price, just make sure to see how the camera has been used/how much it has bene used.
As for something that works for less then 1599$ retail, the digital rebel is not a bad camera for 799$ retail. You can find them for less online, just be careful where you shop.