Romney looks like the strongest general election candidate:
While no GOP candidate has established a consistent lead, Romney and Perry show the greatest number of leads. Romney’s results are in a more compact region, showing some consistency as a serious challenger to Obama. Perry’s data is much more spread out, though this could reflect both his recent entry and relative unfamiliarity with voters as well as his recent downturn seen in the first chart above. We need more time to get a good fix on the dynamics of the Perry candidacy.
The Dish 