Well guys, after lots of reading/comparisons, I have decided to pick me up a Tamron SP AF17-50mm F/2.8 XR Di II Lens for 60D. I compared it two both the:
Sigma 17-50mm F2.8 EX DC OS HSM
and
Tamron SP AF17-50mm F/2.8 XR Di II VC
Seems to me that the Tamron SP AF17-50mm F/2.8 XR Di II is shaper through all f-stops and zoom ranges even without the VC Anti-Shake.
So now to search for the Best Deal.
Tamron -17-50mm F/2.8(Model A16)