I originally looked at a double flight available on amazon. Not HQ or A&E but an off brand. I thought that would be my best bet, but I'm extremely nervous with the 1" gap the divider leaves when it is taken out. Do all double flights have this issue? The birds are in their own room but I still fear escapees. The amount of room the cage takes up isn't my favorite either.
But then I found the prevue f050, which provides more area for the birds, but it's vertical. I know I read somewhere in this forum that finches...prefer? horizontal flight to vertical, but will they be okay with a vertical cage? The width of the cage is 37" so it's still a decent amount of horizontal space.
I thought I'd get everyone's two cents since I can't decide and you guys haven't led me a stray yet.

Double flight: http://www.amazon.com/gp/aw/d/B00CTTCBK ... mp_s_a_1_1
Prevue f050: http://www.amazon.com/gp/aw/d/B0002AQ22 ... ot_redir=1