Well I figured the only way to find out was to try them all. So far I've tried Jump Desktop and Mocha RDP.
Jump was pretty meh, the display didn't look very good and it didn't draw my desktop background. The mouse feature wasn't very good IMO, you have to painstakingly position the cursor where you want it, not intuitive.
Mocha RDP was a bit better. The display was nicer and it ran a decent amount faster than Jump. The one thing I really liked about Mocha RDP was it has a mouse scroll function, which is exactly what I was looking for. But Mocha does not have sound streaming, which is a definite minus.
I'll probably give desktop rdp a try as well, and may even check out logmein.
The one HUGE gripe that I can't get over with all of these programs is why is the screen not anchored?!?!?!? The program resizes the desktop to fit into the ipads resolution so there is no need to pan around. Yes I know sometimes you need to zoom (although quite honestly I don't see really having to zoom very often), but it should still be anchored so you can't pan it around unless you are zoomed in.
Pretty cool stuff nonetheless.