I have a few other lens's in my collection.
Tamron AF 10-24mm f/3.5-4.5
Canon EF 100mm f/2.8 Macro
Canon EFS 55-250mm f/4.0-5.6
Sigma 18-50mm f/2.8-4.5
I'd like to get some better Len's. I'm thinking about selling the kit lens though. My favorite lens is the Canon 100mm macro. The pics are just beautiful. I took my kids trick or treating last night and wasn't impressed with the kit lens at all. I'm thinking I would have been better off with the EFS 55-250 or even the 100mm macro but I wanted to give the kit lens the opportunity to redeem itself. The low light performance was ok but not great.
If you've got this lens lineup, you can just sell 28-135. You don't need it. Actually you don't need anything anymore (for 7D) except one for low-light. I suggest getting a 28mm F1.8 USM or 35mm F2 or a 50mm F1.8 or 50mm F1.4 USM at the very least... The 24mm F2.8 IS or the 28mm version are also very nice but a little bit pricey.