I've been fighting this dilemma myself as well. I decided I'd use a 2074 so I won't need an unsightly powerhead. If you go for overkill, you can always dial back flow.
I think the general consensus is that a 2217 is sufficient though from my research. Every time I've followed that wisdom on previous tanks I've ended up dissatisfied with the results. I'm no expert though, might wanna wait for more feedback, just my $0.02.