I recently purchased a Canon EOS 500d SLR with an18-135mm lens abd wabted an easy, versatile way to carry it together with a 75-300mm lens.
The Lowepro 50AW toploader easily takes the camera with short zoom attached, and would, if I chose to remove the protective pad in the bottom, accommodate it with the larger lens. The bag is well made, has storage for batterries/cards etc and a very handy rain cover. The sliplock tab on the side takes my spare lens pouch and with belt loop, shoulder strap and carrying handle, is very versatile indeed.
A good choice, and coupled with the usual excellent service from Amazon, a good all round buying experience