Thanks @Puckstopper, that’s hugely helpful. I would plan to use a professor strap if I go with the V9s, but to switch to the SLR2 style strap with the single piece of elastic and the magnetic clip. That’s at least in part because I find the elastic a pain to loop through once the pad is up on my leg, but also because the two layers of thick elastic made the pad actually feel too tight. Dennis said I could either add an inch to the V9 style strap or switch to the SLR2 style - can’t really go wrong either way.
My biggest concern with the GIVs is that they appear to be a fairly loose-fitting pad, which seems odd IMO for a flexible pad. I’d be looking to do something to get that more connected feel, like adding Brian’s version of the professor strap, adding their optional calf straps, or even doing the full Optik 2 leg channel if that’s possible, since I also really like the calf pillow on the V9s.
Like you said, though, either way I’ll be getting a great product and one that will no doubt be a big improvement over what I have now. The GIVs definitely win on looks, maybe that should be the tiebreaker. Look good, feel good, play good...or something like that.