AS Challenger mk 2 vs. Avid Diva 2 sp vs. Rega P9

You may want to consider the Rega RP8! I think it will soon be available, if not already. I also recommend the Well Tempered Amadeus, as another option. I am buying a TT for a second system, and have settled on the standard Amadeus.
Another interesting table that's not too expensive is the Merrill REAL table. The only one I know from experience is the Amadeus,the GTA would fall in to your general price range

Townshend Rock is another worth considering.

Roscoeiii-Having read your other posts I assume you own the Townshend Rock 7? Is it true that the standard motor is very power cord sensitive? Does the standard motor use a wall wart as a power supply? These possible issues had swayed me away from the Rock 7, since the optional power supply/dc motor which addresses these issues costs an additional $1900.

Dayglow- It sounds like you may have read it, but there is an A/S review of the Rock 7. It's written by Robert Greene, and he makes comparisons between the Rock and the Amadeus. What I drew from the review was he seemed to like the Rock a bit better. He also thinks they are cut from a very similar sonic cloth. Perhaps both tables using damping, may contribute to their sonic similarities. Again, just one persons view, but an interesting read. That review comes up if you google Townshend rock 7. My thought on the Rega's is the company seems to be implementing changes to their newer models. The RP3, RP6, and RP8, I believe would be those latest models.

Fjn04-I think i've read every review regarding the Rock 7. I just think at this price level a seperate power supply and speed control should be standard, not a $1900 option. Rega is now taking pre-orders for the flagship RP10 in the UK. Rega has removed the P9 from their website, meaning remaining stock should be getting a healthy discount.