As per ur scenario, it is difficult to imagine a full picture from here. If I am not wrong, u want a different option / solution for the same. I hope u heard about RHEV…. I think this can help u to understand the current scenario. But one problem is that, there is necessary of Windows Server 2003 / 2008. But early in coming year, I hope a java based interface will launch instead of using Windows Server 2003 / 2008. For more info:
and I am providing two more link for ur better concept….