I really like to shoot a bit of everything. Landscape, portrait and would like action sports plus birds/wildlife. Lenses not much if an issue really as only have a EFS17-85 which is bolted on most of the time plus an EF 1.8 50mm and an EF 75-300 4-5.6, plus the kit lens that came with it, not sure where it is or what it is TBH. I have got a grip plus a canon speed lite 430EX but assume that (light) would be interchangeable? Budget not great (always the way) but I have started to lose a bit of interest as camera/lenses not as fast/sharp as I would like. Have considered (& want) EF 70-200 preferably f2.8, although considering f4, but would also like another body, so dilemma is do I get another 450 (so grip and SD cards remain constant) or go for something faster with better low light ability or will another 450 plus a 70-200 and a couple of primes "satisfy" ?