The apps themselves don't actually use flash, either.
As far as I'm aware those ROMs should work on any variety of this particular phone, but I'd personally research the heck out of that before I took that risk. Personally, I'm not comfortable with any of the ROMs out there, so my Viewpad, while rooted, is still stock.
Next Phone: Your guess is as good as mine!
Nook HD+: Rooted, no need to ROM.
Atrix 2: Rooted, soon to be retired.