I think there is a huge difference between SWC and any other body, from form factor to ... convenient lack of choice. Sometimes, and sometimes often, not having to think of choices works to advantage. SWC gives a choice, what it has or none. So once taken it becomes a tool with single view, feet to work it, and vision to exploit it.
I mentioned working SWC off a tripod because I see some applications where it will have to be steadied up. And using ground glass requires it, which I would definitely do. Working handheld is appealing, even if am a bit puzzled why some apparently use it this way almost exclusively.
But I can't fool myself thinking I'll get SWC and somehow stop there. While it is a sole stand alone in V-system by its shear design, it is still part of it accepting a number of accessories. So what I think will be smart is SWC & 503 combo. But that requires more considerations before pulling the trigger.
I feel about the same, though I would prefer the 500 CM, because of it's simplicity and lack of battery demands, though I'd like a second,, as a back up, or even a 500 EL model/type just as well.
Frankly, I would buy an '01 or '03 model if they were in a good price range an I had the money to spend on one, however, I, like all here have ideal bag sets in mind and the 38mm Biogon is in there as well, though I expect to have to use the 50mm Distagon which is what I have, Happy and Forevermore.
Hasselblad 'V' Series are just lovely in the hand, and when used well, produce wonderful works, though I wish they were weather 'protected, like the indomitable Canon F1n and F1N or Nikon F.
Cheers