Congrats on the progress so far. However, I think you really need to focus on making the purchase page more structured towards helping the buyer make a proper decision. Right now it's a sea of text and a row of prices. I'm inclined to ignore the text and choose the lowest price, even if it's not in my best interest.

This post at 37 Signals is a great reference for you: http://www.37signals.com/svn/posts/1496-design-decisions-the...