No idea what the skilter is like, but if you plought the bulletein boards the words skilter and rubbish come together a lot.... I don't think any of the mixed biofilter/skimmer combos are particularly great except the BakPak, and most people seem to remove the biomaterial in that anyway. I don't really know what brands of cheap airpowered are very good, I used a miniflotor in the past and it was ok, but needed lots maintenance, I\m not sure it wasso much better than a diy. You could always go without, and rely on smart stocking ,good set up and 2 small water changes a week.
If you want an easy life, go for a live rock based system, read old live rock threads on here. Do you live in an area with lots , or at least some, good shops to buy the stuff? You can fabricate biofiltration w/out live rock, but it's never as divverse, and you always hear from people having endless problems, plus it makes the tank look less sterile.
Personally I'd go for a fine aragonite sand , preferably oolitic, for a substrate.
Have you done lots of reading yet..... the more you learn up fron the less the chance for disaster. Fenners Book 'The Conscientious Marine Aquarist ' is my favourite, it's all their on his website wetwebmedia.com, though the filtration/setup section is big andhard to read, a book by Michael Paletta is good too.