[gentoo-user] Picking dom0 OS for new XEN server

[Håkon Alstadheim]

Pondering dom0 os for new Xen server (Xeon e5 2620 v3 cpu) . Server is 
for home use. (routing/firewall; dns/dhcp, mail servers, etc. etc; linux 
gui desktop; linux media-server; windows as separate domains).

I have basic skills in debian, and gentoo. A bit rusty on the rpm-based 
distros. Totally unfamiliar with *BSD. Total newbie in XEN

So, given this list is bound to be a bit biased, : why would I pick 
gentoo for dom0, and what version of XEN would I use ?