I'd actually like to propose that you're going WAY overkill on this tank as far as filtration is concerned. You've got a skimmer with LR (berlin method), a canister, AND a UGF. Thats a TON of filtration capacity, more than you'll need.
UGFs have been largely abandoned for the Berlin method cause they're much harder to maintain. As has been illustrated countless times here, if detritus is allowed to accumulate in a UGF, they become nitrate factories. Painstaking vaccuming is required to properly manage one longterm. People kept reefs quite successfully (especially back in the '70s-90s) with UGFs for filtration, but they also had to maintain them a lot.
I don't know anything about your personal time schedule/committment that you can put into this tank, but if you're like 95% of the population out there, your time is probably better spent doing other things than maintaining and worrying about a UGF.
Again, we can't make the choice for you, and I can only tell you that my own tank has been very successful using the berlin method (LR+Skimmer).
Btw, great choice of skimmer
Those AquaC's are really reliable, compact, easy to tweak, and pull a heck of a lot of DOCs. You'd be hard-pressed to find a better one for a tank that size.