Thanks for the input guys.
The Boda looks very well designed and sure can carry a lot, however I am not too hot on the design. Looks a little too much like a camera bag for me. I prefer something a little more subtle and, dare I say stylish. If I was a sports shooter or something I could definitely see me going for it though.
Looks wise I really like the Think Tank one, but one more problem I have noted is that there isn't anywhere to specifically put a flash gun. An elasticated pocket on the end of each side of the bag would have been ideal as my Urban Disguise has one of these which I always put my flash gun in. I guess I could put it in the rear panel (that lays against the body) but I imagine this may be somewhat uncomfortable.
Shootsac I like the idea of and I believe it has 3 rear pockets also so the flashgun could go in there, however I feel it is a lot of money for what it actually is. Plus neoprene (or whatever it is called) looks a bit naff. I understand it's also difficult to source these in the UK?
Lens wise I'm gonna be looking at a 50mm 1.4, 70-200mm, 35mm 1.4 (when I get it) and a 28-75mm. In fact once I have the 35mm I may just leave the 28-75mm zoom in my case which would then create a space for the flash.
Thanks
Rob