Looks like we have six votes for 3 and two votes for nothing.

If you want minimalistic, look at the wallet as it is now. It looks exactly like the bitcoin qt 4 wallet. Is that reeaaallly what you want? to look like every other wallet out there? At least we are setting ourselves apart.

We could go with a flat black background, but obviously that is less appealing to the eyeballs, and shows no class.
I'll put some more time into the wallet design later today.