Just bought my new master server;
Sun T5220, 8core 1.4GHz, 32GB RAM, Solaris 10
2 - 10Gb Ethernet cards
2 - dual port 4Gb PCIe hba's
attached to a Sun L700 with 8 LTO4 drives and 12 media server all over the country, backin' up 400 clients with about 100TB.
It cost quite a lot but you'll have a great machine.
Peter