Your last sentence is right: buy now. One of my favorite cameras has all four exposures (if you use Pentax 'A' and newer lenses). It is the Pentax P3n. And I do use all four, but I use shutter priority the least. The P3n is limited compared to the 7s by being DX only (no override), and 1/100 flash sync. If it was 6 years ago I'd buy one. I oped for Olympus 35RC which is a good little camera but I find I'm a little nervous about busting it.
Thanks for the article I wish I had read it 6 years ago.
Anyone want to trade a RC for a 7s?