I wonder, will I be able to use Xen on RHEL6 servers? Should I? I'm learning to use virtualization and I picked Xen because seemed to me like solid technology

I wonder, will I be able to use Xen on RHEL6 servers? Should I? I'm learning to use virtualization and I picked Xen because seemed to me like solid technology - it's good for Amazon, Google and prgmr.com, so surely it will be good enough for me? On the other hand, it is not included in the kernel, its usage tends to lead to using anscient kernels, Red Hat and Ubuntu are moving away from it. I'm in doubt what virtualization technology should I be using.