Got it! Everything went off without a hitch! Took less than an hour and everyone's alive and kickin'!
Thinking they like their new spot - lots more for them to look at rather than a white wall. =P
As far as the floor supports go, I had several people take a look at the support beams and make sure that the tank ran perpendicular to the boards. So, all's well!
Thanks for the tips and advice all!