If I HAD to buy a mobo on Sunday, I'd try to get one of the new nforce2s (but not leadtech, 'cause there is an important nforce2 chipset feature that isn't enabled...exactly WHICH one it is, I can't remember right now)
Personally, I'm waiting for the epox nforce2 board. But nobody knows when they'll be available.
As for the 2400, you again might be better off waiting for the AIUCB steppings to get sold so you can get a 2400 using AIUGB - The same stepping used in the 2600s.
If you can get the place you buy from to *guarantee* you a 2400 AIUGB, then that would be ideal...wishful thinking, probably though.