To be honest, I'd like EVERYTHING - I'd love Larian-made BG 1 & 2 remakes, but I'm also beside myself with excitement about the stories they've yet to tell.
Confess I haven't read the rest of this thread very throughly, so perhaps this has been suggested already, but maybe when the mod tools are available, there would be a potential for fan-made remakes? Are the audio assets from the first two games available to play with? I'm sure the licensing is a minefield but perhaps it doesn't have to be Larian alone but a collaboration of some sort. I expect I'm being incredibly simplistic about how this would work.
Anyway, DO WANT and absolutely WOULD BUY if they were available.
There will never be official mod tools that allow people to fully create the maps from BG1 and 2, and building them by hand is probably much more work than anybody is going to exert.