I bought a Lenovo ThinkServer TD340 awhile back on a sale, not realizing how expensive upgrade CPUs would be.
Lenovo ThinkServer TD340 Tower Server System Intel Xeon E5-2403 v2 70B5001TUX-Newegg.com
I got 2 of these, as it takes the v1 chips. Now I have to max out the RAM, and then try to sell...