I also have a PC 13 watt that I would modify to fit. I want to set up something between 2.5 to 7 gal.
And am looking at the Mini Bows by All-Glass. I saw the Nano Cube at Nano-Reef.com and thought about it.
It is either a 12 or 14 gal and runs for $96 to $149 depending on where you get it. I like the setup but a bit larger then I would like to go. I originally was going to get the eclipse system 3 a 3gal, but all the salt reviews I read were not the best more reefer where using the MiniBows because you can hang filters on the back which would not block light and is cheaper the eclipse. What I would Ike to do I make a 5 to 8 gal out of acrylic but I have not found a cheep place to buy it yet. It would cost me more to make one then buy one.

Right now just looking for the chaepest tank setup.