Virtualization - what do You recommend?

[Rafał Radecki <radecki.rafal@gmail.com>]

Hi All.

I plan to use virtualization in my production environment. I plan to use one of the following options:
- KVM;
- VMWare Esxi;
- VMWare Workstation.

I plan to install Windows 2008 as a guest. I want to use something like LVM snapshots for backups. Stability is also very important, the guest will be used as a production server.
Which option could You recommend and why? 

Thank You very much in advance :)

With regards,
R.