have you tried all the free premium-like wordpress themes? you just might be able to get a very good theme for free instead of paying for it. they're all tweakable anyway. you sound like you're good at customizing it urself, so why not get a free theme that comes close to what you like, and then customize it to make it yours?
I ended up buying Affiliate Theme, which I think is a great Theme. What made it even better, is I just began to start tracking, using Prosper202, on a couple of other domains. I was having a lot of challenges with getting the codes to function properly within Wordpress. But, using Affiliate Theme, it is easy. It seems to be that the 'bar' keeps getting higher for the quality one can expect from a free theme. However, I think it is still worth spending some cash to ensure you get exactly what you want, especially if you intend to have the site around for awhile. Cheers, Jeromy