.....simmer down, there, boys......lets get back to the important stuff, the fotography...........
I travelled/backpacked in India for a month in 2005, I took an M6 with 15-28-50-90mm lenses and a digi P&S. Although 4 lenses was great, I still think it was one too many. If I were to do it again, I would only take 3 lenses, to focus my photographic intent a bit more. Too many lenses for me equals too many choices, and distracts me from getting better shots with fewer lenses (although I may not get the variety of shots).
I travelled with an Aussie buddy who had Konica RF with 2 lenses and a Rolleicord TLR. I think his use of 2 formats with fewer lenses was a wiser choice.
Based on this, I would definitely go with the RF and a smaller mdium format. And heres another reason why: many of the people of India are watching you as closely as you are watching them--> the more inconspicuous the camera the better, thus the RF with few lenses to change around. I mean, if you just shooting the main tourist spots of building and stuff, then its no big deal, but I think the more interesting shots are of the people, and certainly here, inobtrusiveness is rewarded..And the TLR/med format? well, you will get such detailed shots that the negatives will remind your every fiber the excitement yoiu were feeling at that moment.
my 2 rupees........