We used to be a big fan and user of Vizioncore as well.  After so many missed delays in delivering 4.0 we were highly disappointed with the release.  Even better ask them about ESXi support, wait for it, wait for it.  Too bad Dave sold the company to Quest, I have lost complete faith.  We are looking at ESXpress and Veeam. Leaning towards Veeam right now, they even are willing to buy back our vRanger licenses.