Can't say I have much use for a server, unless I were to do something cool like running a search engine where 100GB is indispensable, or some kind of data mining.
Technology is gay and awful though so I'm actually thinking I should get a rockpro and that'll be most of what I need. A quiet, tablet-shaped thing I can mount to an arm over my bed, no jewgle, HDMI out when the 7" screen isn't enough, and USB in so I can type properly. When I need to build something or do some other heavyweight process, I can just SSH into a big, stupid botnet desktop i'll keep in the basement, where it can be as hot and loud as it wants.
Total price should be about $500.