Nice score!
May I suggest to monitor the power consumption for a bit after getting everything up and running? If power is cheap around your parts you probably don't need to worry, but if it is not, things could quickly add up, as tends to be the case with anything running 24/7 and doubly so with more venerable hardware. It's probably fine, but just so you don't get blindsided by a big bill.
That being said, tinkering with server hardware can be lots of fun. Desktop hardware is cool and all, but the specialized enterprise features they put on servers can be interesting to play around with. If you're not familiar, be sure to check out the iDRAC!