Thanks! I did quite a bit of research last night and now I'm also seriously considering a Lifereef 36 inch too. My use is for filtration for almost an entire fish room. 125 gallon FOWLR (heavy bioload), 120 mixed reef (medium bioload), 50 gallon frag (light bioload), and specimen tanks: 2x20 and 2x40 gallon. I think that equates to about a 300 gallon tank heavily stocked.
well, I'm thinking here. Sounds like you've got a pretty modular set up that could possible grow more so in the future. in your case I may go a size larger just too buffer any potential future upgrades. Either the 2060, or the 2560 even would be all you'd ever need id bet.
for what its worth, I've converted a number of lifereef users, that were blown away by their Deltecs after seeing them in action, by comparison.