I'm not going to yell
But I certainly would recommend to ~not~ use Artisteer. I've seen too many posts in this forum about problems with Artisteer. And more than one Artisteer SPAM post - any product that needs to SPAM to get word out is suspect to me.
Nothing personal, but if you've looked at ~800 themes and didn't see any you liked, I doubt if any members that don't know your tastes are going to be able to help you find something that you do like.
As ralph.m mentioned, most if not all themes will allow you to modify the colors and add a logo.
And as ralph.m suggested, creating your own "clean cut" theme is probably the way to go, especially since you "already have a designer to do all the CSS and or HTML stuff that needs to be done". IMHO if he can't code up a theme for you, you probably don't want him coding for you.