I am big fan of arch linux. I had been using xen for ever but after reading this forum it seem everyone believes that kvm has better performance. Is there good front end that can complied from source ? What is best place to get kvm support .
If by frontend you mean GUI you can use for managing some servers, then, there's virt-manager, which is a VMware-like thing you can use to remotely manage the server. It is probably a safer bet than installing a web panel for it unless you're planning to do a hosting company.