Cheap walkaround lens

I would just pick up another used 18-55 IS. Make sure it's the IS version, as it's quite good optically. You can get it used for $90-$100 at POTN or some such place.

And the 28-80 is crap, notoriously so. Stick with the 18-55 IS, which is the best you'll get for such a low budget.

The only other lens in your price range worth considering is the Canon 50mm f/1.8 mkII, and excellent lens for the money. However it's a prime lens, and a medium telephoto lens, something you may not be looking for.

a used 18-55 would be a good buy for what your after. Or buy a better lens and use your 28-135 as your cheap walk around..

I just found this Sigma 18-50mm: http://www.amazon.com/Sigma-18-50mm-.../dp/B002DGXUQK

I've looked at some reviews and they seem to suggest that it is slightly better than Canon's 18-55mm. I don't mind not having IS, just don't need it at this range. However I'm a bit skeptical of the motor. I've used a cheap Sigma telephoto before and the motor was loud and horribly slow, but it had great quality for what it was worth.

The 18-55mm (IS/VR) lenses from Canon and Nikon are stellar for their price, especially at f/8. That really should be your walkaround lens.

Alright I'm picking up the new lens tomorrow (or later today technically) and it's not a 28-80mm USM or a 18-55mm IS. I made up my mind and decided to trade my current 28-135mm IS USM straight up for a 17-85mm IS USM. Just a bit funny how the guy I'm trading with has the exact brand/type of filter as mine and lens in pretty much the same conditions, with the Canon hood. Almost like a perfect match. Figured this is the best option since I've never really gotten to use my 28-135mm much and instead always going back to using the 18-55mm (non-IS) or the 70-200mm f/4L. For my use I guess it's just better to have the 17-85mm in place of both the 18-55mm and the 28-135mm. Besides, the 28-135mm isn't exactly light nor compact for a walkaround lens.