I'm just waiting to see two things:
1. The actual release of such a kit by Panda.
2. What kind of detail it will have.
While Trumpeter has a pretty good track record for releasing what it advertises, I haven't seen anything lately from Panda. Where's the 1/35 CH-47 they've been promising forever?
The chunky & clunky detail I've seen with their releases to date doesn't excite me too much, either. Of course I won't judge any release until I actually see it, but they're not going to sell me a B-17 on size alone.
As far as space goes, with aircraft, you have an entire ceiling available to hang 'em! So unless you've already got a bit of an aluminum overcast in your home, space shouldn't be a problem!