Hi, I'm looking out for a Lowepro bag for my Nikon D80.. and would like some guidance on what may suit me! At the moment I only have the standard 18-135mm kit lens along with batteries, etc. At the moment I have my eyes on this page: http://www.lowepro.com/Products/Shoulder_Bags/allWeather/ - what is the difference between the product lines - Apex, Rezo, etc? I'm thinking of getting a shoulder bag, and a slingshot 200 AW. I like the idea of the shoulder bag since it's small and accessible. Is a shoulder bag comfortable - consider I'd only be carrying one body and lens attached? Does it hold camera with lens attached? The slingshot 200 AW would be something I'd possibly get later on. Any advice? Thanks.