Well, I know you go through millions of threads, but here's my stats:
54 bowfront corner, with a 15 gal sump.
I'm upgrading in to weeks to the Aqeon Proflex Sump Model 1, which will fit my stand, give me two filter socks, and also start my refugium with chaeto.
As it is right now, I'm just not sure where I could place filtration. The LR does okay in the sump, but I still have what looks like micro-dust flying everywhere - It's not terrible, but it could be better.