Let us remember what the OP asked for:
"What system in the $1-2K range U.S. money, would give me the best bang for my buck as an all-around versatile system?"
Not the best. Not your favorite. Not what you use. Not the one that is most like a 35. Not the one that weighs more or less. Not the easiest to use. Not the one that is the most easily hand holdable...but the *best bang for the buck, while being an all-around versatile system*. The one that can do the most, and do it with extreme value.
As far as I see it, there are not all that many camera systems that meet the criterion of "all-around versatile". To me, "all-around versatile" means that the very versatility of the camera is its main draw more than any one feature; a workhorse camera. A pickup truck of a camera. To me, it means, at the least: 1. leaf shutter, 2. interchangeable magazines, 3. SLR, 4. Many accessories...more than one person would ever need, and 5. still manufactured or supported in some way, shape or form. Finally, of course, it should provide outstanding image quality at a wide range of print sizes.
The leaf shutter, interchangeable magazines, and being an SLR are a huge advantage in the area of versatility.
I would say to go with Hassy or a Mamiya RB/RZ, personally. You have the budget, so why not? You will be able to use flash in any situation, be able to exchange magazines, and the systems are still well supported. IMO, if you want to print square pictures, go with the Hassy, but if you will be cropping to fit standard printing papers, go with the Mamiya.
...my $0.02...