My take....
Romney looked like the front runner and was the clear winner in my opinion. He was relaxed, prepared, and professional. He is my favorite of the field. I think he'll make a great President.
Perry made some major gaffes and did not look prepared. He's a cocky sumbitch to boot! I think he is going to lose a lot of support after tonight, especially with moderates. His "ponzi scheme" comments will haunt him, at least in my opinion. I don't like his personality and quite frankly, I've had enough "Texas" to last a lifetime! I won't be surprised of he turns into this cycle's Fred Thompson- comin' on strong!!... then dying on the vine like unpicked fruit.... But... he's got a lot of time to refine and hone his message, and a lot of money to shape opinion. He may have the stamina......we'll see.
Bachman was bland tonight. She looks like a tier 2 player at this point.
Santorum, Cain, Paul, Gingrich, and Huntsman = Tier 2 or 3 players at best. (I'd still take any of them over Obummer!)
The biggest winner tonight was Romney. I think he'll make the best President and have the broadest appeal in the general election.