Well, after my research with a 90 gallon, I would go either Euro-Reef or Aqua C. Here are some links for ya from one of our sponsors 8)
Aqua C EV120/180:
Or a Euro-Reef clone: ASM G1X/G3
Whatever you decide, I would highly suggest against any kind of SeaClone/Prizm unit, or any kind of Skilter. Tried the first and the last, and hated them. Others here have similar thoughts on them. ETSS I hear is good as well, btw
. Find one you think you like, post it here, and I'm sure we'll advise ya further. One thing I've learned... don't skim on the skimmer!
(don't forget AA members get a 6% discount at www.captivereefs.com!!!) Cheers