The possibly most sensible server I have had

bonescallhome was a IBM x3200 M3, which was running Ubuntu server with 32GB of ram. A 4TB RAID-10 storage had been set up using older spinning HDDs, while the server booted off a 500GB boot SSD.

However, this is no longer the case, as finding it too sensible (I mean, it was quiet!), I gave it to a friend.