I dabble in trying to build high performance applications, and parallel computing stuff. I don't do a good job at it, but I would like more practice. I tried to conceive of the type of hardware I would like for my continued practice. These are their stories:
I know from bitcoin mining that some instruction sets are better at somethings, so I'm pretty sure I want two servers, with dual graphics cards. One nvidia, and one ATI (or maybe I'm just an ATI guy but nvidia is kind of sort of blowing them out of the water). I also know I'm probably going to want two Parallella's.
Ocean, a mobile server launched by Redwood-based hardware repair company iCracked, can run all Linux-based operating systems that is built on top of the Linux kernel. It can easily fit into your pocket but is capable of being a full-blown battery powered wireless web server.