Making the payment and account creation experience better

Hi,
I purchased Membership, and am very happy with it, especially the WPMU support. However, I find the payment processing forms (and the user experience) to be pretty awful. Is there another plug-in I can get to make this more seamless and better looking?
Here is my site: http://www.scorbit.org/register
And here is an example of an account creation/payment processing page that meets the standard of what I want my members to experience. https://herbmentor.safechckout.com/order_now?uri=order_now
Thanks,
Chris