From what I've seen your quality is pretty darn good. I'd like to see either Roy Scheider (sp?) or Jane Badler in 24th century grey shouldered Starfleet uniforms. (You might have to go back to some photos from the 80s or early 90s for Badler...she hasn't aged too well IMO).
That Billie Piper one turned out really, really well. Though, a small nitpick, on your main page it says Section 32, but the image is Section 31. Sorry, I notice these things.