Maybe the op wqould like to test aqemu, which is a graphical frontend for qemu and it might be easier for him to configure.
In the comparision of aqemu (with using kvm) and VirtualkBox and Virt-Manager my feeling was, Virtualbox the slowest and both Aqemu and VirtManager faster. The latter two are were looking both even fast. However, virt-manger IMHO still is not very user friendly, especially for beginners, and also its documentation is not much at the moment. But please be respectfull (or is considerately the correct idiom?): virtmanager is rather new and has not many people involved, so it might become better in the future. Virt-manager has great potential. Best regards Hans
