I would have to second the idea of a 20L with an eclipse hood. Should look nice and clean on a desk. I'm pretty much assuming the desk will hold up fine, but you could always try my method. I have an old printer stand that is a perfect fit for a 10g tank. What I did was essentially sat on it for a while (used it as a chair while web surfing LOL) and then jumped up and down on it a bit. Since it never even creaked with my 200+ pounds I figure it could hold a 10g no problem. As for stocking how about a school of harlequin rasporra and 3 or 4 cories?