Older Leica M3 cameras are better value than an M6 and excellent performers even with a good 1950s Summicron, I used my for many years before deciding that I was no longer interested in 35mm and switching to a Yashicamat (Turkey) and Rolleiflex's (UK).

I think RR is right about medium format it gives that edge in terms of image quality compared to 35mm. I just carry my TLR's using the neck strap, the case/backpack is for my LF gear