Rasmussen Reports:

The latest Rasmussen Reports telephone survey of Likely Voters in the state finds Buck earning 48% support to Bennet’s 44%. Three percent (3%) prefer another candidate in the race, and six percent (6%) are undecided. (To see survey question wording, click here.)
The race remains a Toss-Up in the Rasmussen Reports Election 2010 Senate Balance of Power rankings.
Two weeks ago, the candidates were in a near tie with Buck leading 47% to 45%, the closest the race had been in eight months of surveying. In surveys since March, Buck has earned 44% to 51% support, while backing for Bennet has ranged from 38% to 45%.

CNN/Time:

Oct. 20-26, 2010 (Likely Voters)
Bennet 46%
Buck 47%
Other 4%
No Opinion 3%