Digital SLR lens pricing?

I've been looking to buy a new wide angle zoom lens for my Canon dSLR & I've narrowed it down to a few lenses. Price is a big issue for me, but getting a good lens comes first. I recently bought a Sigma tele lens & was very impressed with the the build as well as image quality. Among the finalists so far is a Sigma 10-20mm that's within the price range I could handle. I know Tamron recently had a rebate program (now expired) where a comparable lens would have qualified, but I wasn't able to act then. Does anyone know of any mfrs. discount or rebate programs that typically are offered seasonally? I'd be willing to delay a purchase for a reasonable length of time if something might be available in the near future. Any thoughts or advice will be appreciated.

Bryan2011-05-11T17:51:40Z

It is becoming more and more difficult to find generic lenses for the newer digital SLR cameras. The lenses are often manufactured by a lens maker such as Tamron but under a contract with a specific camera manufacturer for a specific camera and not sold as a generic Tamron lens. You are one of the lucky ones to find generic lenses for your camera.

keerok2011-05-11T10:34:50Z

You are treading on dangerous waters. Canon is the most sensitive to compatibility issues. Anything offered on sale with discounts is sure to be a candidate for the dreaded Err99.

Digital One2011-05-11T19:07:01Z

The canon lenses are faster and long lasting 15yrs and still working great.