Are you putting the skimmer in the sump? I have used the Coralife Needle Wheel Super Skimmer, the Red Sea Berlin Turbo XS and the Marineland Seaclone skimmer. I had luck with all three, but was never impressed with them. The Reef Octopus
has good reviews, this is a recirculating version, and that is always a plus. A few members here have had luck with the Remora
series of skimmers, but I have no personal experience with them. The main thing is to get a skimmer rated above your tank volume, like I would go with a 125 for a 46 tank.
You can always seed the tank with a little bit of live rock, and use the rest as base (also called dead or dry) rock. You can add dry rock whenever, even after you have added fish. The same goes with sand. Add about 20 lbs of live sand and use the rest as dry sand and it will be seeded.
If you don't go with a deep sand bed, and only do a lb of live rock per gallon, I would keep the bioload down on your tank, meaning keep less creatures. A 46 will be limited for fish as it is, mostly you will be looking at clowns, dottybacks, cardinals, some wrasses, a few pygmy angels are ok, gobies, blennies, basslets and damsels. Everything else will get too big for a 46.