Cubes are great because of the simplicity of them. However, it you want a nice custom setup with everything that YOU want, I would suggest a 10 gallon...or even better, a 20gallon long....and purchase everything that you want. This is the most flexible way to do it...with the nanocubes, you are pretty much stuck with what you get. They are nice though, and the 2006 models come with a surface skimmer and an upgraded return pump.
Personally, if I had to start all new again, I would go with the 20 gallon long (30"Lx12"Wx12"T), get a 30" power compact or better yet a VHO lighting fixture, an Aqua-C Remora skimmer, a powerhead or two, around 18-20 lbs of live rock, and around 30-40 lbs live sand. While this is more expensive, I think a system like this will be much more fun and flexible...just my opinion. It all depends on how much you are willing to spend.
Here is a great 30" fixture...$135
http://www.drsfostersmith.com/Product/P ... 004+113345
--A 20g long is about $25 at PetSmart...
--A bakpak 2r skimmer would work, the aqua-c remora is a little better...~$100-$150
--A couple power heads....~$15-$30
--20lbs LR and ~30lbs LS...~$120
**Basic 20g long setup = ~$450**
**Basic nano cube setup (tank, LR, LS, power head....) = ~$250**
Dont forget tes kits, salt, hydrometer or refractometer, livestock, probably a couple other things I forgot.
HTH,
Jesse
***BTW everybody...great deals on Orbit PC fixtures at drsfostersmith.com right now.