What sort of tuning are you planning on doing to it? If you're planning on making it pretty much an underpowered 390 GTR Group 4...ehhh, it wouldn't be particularly exciting to me. If it's going to be more like a slightly-less-powerful 350 GT with a race 6-speed and a race rear diff, then that would be exciting, in my opinion. It would have enough handling and braking to allow it to be decently controllable, even with a keyboard, without being almost impossible to spin out. Of course, do whatever you want to do, but that's just my opinion on the whole "ease of use vs. determination of skill" argument.
No wing, 5-speed, 3.2L, racing LSD, dual exhaust sounds perfect, not too OP in areas, but allows dif tuning for those who know how.
That's just what I was thinking! That's a perfect combination of parts, to be honest. I just made this config that's almost exactly like that, based off the 350 GT, except it has quad exhausts instead of dual, and it's the most perfect Bolide I've ever driven. It's still twitchy, it's still a little uncontrollable, but it can handle very well, maybe even better than the 390 GTRs. It's so good that I think I may want to change my default to this thing.