IQ($199)/Atrex($299)/Quotewerks($229) US$ (GST Compliant)

I'm trying to decide between these order processing quoting packages, but I can't find any reviews. Can you give some pros and cons or suggest other products?

I will be running an online computer store, mainly drop shipping. Pricelist import and price comparison is important. I will be using candypress as a web site.

Thanks in advance for any help.

Add Interprise (free) to that list.