Yep, Vuel is the best. But I don't like the little page-corner gfx. You should get rid of those.
HiO iWay (the fourth one) is so nice!
Does the multicolor option mean that every user will be able to choose the color displayed?
All the skins look uninteresting. Morbid black and Vuel are the cleanest of the templates. Vuel has a problem with the login box which does not render correct in all browsers (please verify). Can you not get some other theme as option? The current one is too crumpy on the horizontal.
Look at the following before you proceed :-
-- All the best !