Im looking to pick up a new everyday lens for my rebel xt for xmas i got my 70-200 telephoto and my 100mm macro. but however im still using my 18-55 kit lens. i want something with a wider angle and better zoom. something so that its more then the 18-55 and not as much as my telephoto.
So are you saying that you want a lens that goes wider than 18mm, but also zooms up to 70mm or so? This may be difficult.
i would like to keep it under say $450?
Hm. I'm assuming that that's US dollars. Amazon sells Canon's 17-85mm zoom for around $517, which is a pretty good price for a reasonable lens, and it's the one I'd recommend as being a reasonable tradeoff between price and performance. You won't be able to go wider than that in the Canon lineup without getting the 10-22mm, which is a shade under $700. Sigma may have something - I honestly don't know - or maybe Tokina.
But frankly, if you're looking for something significantly wider than 18mm, you're talking about an ultra-wide angle lens, which is not going to be cheap. 17mm vs 18mm is hardly a big difference, so if your current lens isn't wide enough, you won't be happy with the 17-85mm (or the 17-40, or other options in that focal length range.)
If you want to stick with Canon, the 17-40mm f/4 is a nice lens. Canon's 17-85 IS lens doesn't seem that impressive, and the 17-55 f/2.8 IS is over $1000.
The 17-40mm is a very nice lens, and it's one I'd seriously consider if I were buying a camera now; the only issue that may cause Ricky problems is its lack of zoom (which I don't see as necessarily being a problem, but ... well ...). I can see where you're coming from with the comments about the 17-85mm - it does have its issues (amongst them some pretty noticeable barrel distortion, especially at the wide end), but in my opinion, they aren't significant enough to cause grief. Is it L series quality? Probably not. But it is good enough for most people, and it is a definite step up from the 18-55.
The 17-55 f/2.8 is nice, but too expensive for most people, especially since the people most likely to be interested in it are probably also the people most likely to move to a full frame body, where it can't be used.