Alot depends on cash flow, and what your intentions are for your tank?????? If money isn't an object and depending on size of tank, for a skimmer I'd go with something on the line of Deltec skimmers and Red Dragon pumps......Both are super nice.....
On a more conservative budget I'd choose Sequence for my pump, either GEO, ASM, or EuroReef for my needlewheel skimmers, or if your looking at a beckett style skimmer, I would look at Barrs' and MRC skimmers......
For filtration I'd definitely look into a sump....Again this all depends on budget and space limitations as well.....What size tank are we talking about and what are you planning on keeping in the tank??? What about lighting?