Your site looks great, nice work! How did you find Aceshop to work with out of interest? Their site doesn't give a demo for the admin side of things. Looking at options for stores that are integrated with Joomla, so an appraisal of Aceshop would be handy!
Aceshop was awesome. The awesome part came from Opencart - great product.
I banged my head for so long with Virtuemart 1 and 2, Tienda, and RedShop that Opencart was like a breath of fresh air. Opencart is stable, has a great community like Rockettheme's, and tons of extensions. I looked at other Joomla ecommerce components and didn't find a good option, but Aceshop worked and I'll be working on using it on new sites.
One caveat for you: the Aceshop developer left JoomAce to start his own company (search for mijoshop) and I don't know how much support JoomAce is providing.
[Note to Igor Mihalko: Igor if that last sentence was advertising, please send a thunderbolt and remove the info ]
Whatever the source, OpenCart was a dream to work with. Let me know if I can help you in any way.