Recommendation to provide linux virtual desktops solution

Dear Folks,

We need to provide a VDI solution for anyone of the following Linux desktops.

1. Ubuntu dektop
2. Linux Mint
3. Red hat Desktop OS

According to details I gathered so Far these are the options

1. VERDE
2. Oracle VDI
3. RHEV
4. Ulteo

We need both persistent and non persistent desktops. Please provide your recommendations any idea's. Help us choose the right solution

Thanks and Regards
J P Raj