A new server can be a very nice Happy Holidays, Merry Christmas, or Happy Hanukkah present to yourself.
Bert will probably agree w/ me, look at the Dell PowerEdge series. There are numerous server options from very affordable to very expensive. The Dell support program, extended warrantees are very worthwhile. He and I have both subscribed to them and found their customer service and tech support very reliable.
I'v had my Dell PowerEdge 2900 for 3 years, and as I've mentioned above I'm just upgrading it. I don't really NEED to upgrade yet, but I want to. It has tremendous capacity to upgrade.
That's my point, if you are going to buy a new server consider getting one that meets your needs for today but has room to expand to meet your demands for tomorrow.