If you can find a decent 7s, you can also have your shoe available. A very nice shooter, with the long RF needed for a lens like the 0.95. They don't seem to go for much more than a nice 7, if you can find one without a lens. I've also seen them with the 1.2 for less than the body+lens prices.
A good 0.95 is a reasonably sharp lens, and will compete with the slower stuff when stopped down just a bit. But, really, the reason for using a lens this large and this heavy is to get that max aperture, isn't it?
If you do find a 7s, it will be priced less than an M3, and it's as good as the more expensive marque, AFAIK, and I own both...
Harry