@DiveO2
Hello,
I use at the moment both VM 2 and AceShop, but just for evaluation. Aceshop is an adaption of OpenCart to run with Joomla. It has a lot of features, MultiShop capabilities, an integrated RMA System,a lot of payment and shipping providers included and an excellent shopping cart engine. And, you can use all modules and plugins from OpenCart, they work with Aceshop too.
VM 2 is better integrated into Joomla. It is a native Joomla component, developed for Joomla. For some European countries it is not possible to use OpenCart 'without code modifications' to make it work in a legal way. But, you are right, at the moment Aceshop runs just 'Out of the box', stable and fast. If you do not need customer defined fields at the moment, AceShop is excellent. What I do not like with AceShop: they did change the table names in the database. So you have to buy a long term subscription. You cannot use OpenCart updates and Upgrades. You need to wait until the AceShop developers adapt the OpenCart upgrades to the new version. It may be difficult too to install modules and plugins, which create something in the database tables. The standard installation may not work, because the table names are different.
The blank page problem: Do you use the default VM 2 template or is it another template? It may be a buggy template which produce the blank page issue. Try to use the default template to see if the issue occurs. I have no problems with different servers. I works with a Mac as server and it works with a debian linkux server.