ASP e-commerce applications - recommendations?

[Stevio]

Does anyone know of any good quality low cost ASP e-commerce applications that they use with their web sites?

I have been looking at Candypress.com's cart, but I'm wondering if there might be better options out there.

The CandyPress cart seems to have certain features (like Spanish language support) and other things that seem to overcomplicate the control panel. The HTML code is also not the best (not standards compliant, not even a doctype)!

I want a cart where I can customise and alter the ASP code as necessary, and where the HTML / XHTML code is standards compliant.

Thanks,
Stephen