We have a few websites in Joomla & have used 3D cart & VirtueMart. We're really not happy with the look & features of the store & it seems we are at the point of needing a cart customized for some special features & to have the look we want. At the moment we're looking at Mijoshop, Opencart & nopCommerce. We are creating a digital download shop for software.
Any other carts we should look at or programmers we should work with to get this done at a fair price?
There are dozens, if not hundreds. of off ths shelf cart systems that can manage digital products. Have you looked through a scripts directory such as http://www.hotscripts.com/category/scripts/php/scripts-programs/e-commerce/shopping-carts/ ?