I agree that running a skimmer is never a bad idea. It might not be a must for some tanks but it sure makes life easier. Miz you are starting in on sps and they are VERY picky about water quality, not only the quality but consistency as well. For my money any tank with sps should have a skimmer.

I think Eschopps (sp) has a reasonable price hang on back skimmer that would work for you. ATB has a very expensive HOB that would be sweet but too spendy for a nano. I would avoid any of the itty bitty in chamber skimmers, useless has been my experience. Also some people have had good luck with Aqua-Remora skimmers, me, not so much, the one I have is still hanging on my 22g at home. It's shut off until I find a real use for the mj1200 attached to it. Well built and utterly useless, perhaps mine is an anomaly, but it sucks.

Personally I find it funny when people say your as well off without a skimmer. Can you get by with water changes? Sure you can and over time you'll slowly get a little lazy about water changes (human nature, water changes suck). Not to mention that managing nutrient via water changes will, over time, end up more expensive than just getting a skimmer in the first place.

Oh and Miz, are you VERY sure your not ready to just get a bigger tank with a sump and big boy skimmer? At that point a skimmer for the nano would be a waste. Admit it, Miz your going to go bigger sooner than later, lol.