Any good USFF PC's?

I am currently writing this on a DELL Optiplex 755, USFF with a huge power supply brick attached.
This is the one i use mostly for anything related to .......a lot of things, including running and testing Linuxcnc machines. Have Linux Mint with RT Preempt on it, still has some nice latency times. It was better with Ubuntu 10.04 but not by much, so i am more than happy with it ( especially since i paid 45 Euro for it).
Attached is a latency test i just did for over 40 minutes, while doing all sorts of things on it ( just firefox has over 30 tabs opened with facebook, instagram, this forum, cnczone, ebay, and youtube playing some epic music )

No it does not, but there is the same model with a bit bigger case that has PCI and PS in the case, the same hardware just in a bigger package. There are 4 case versions of the same system, i had them all except the biggest, and all work remarkably well. This one has a built in parallel port, that is what i use mostly.

www.ebay.com/itm/Dell-OptiPlex-755-SFF-D...f:g:afYAAOSwdzVXrLMK

Although that price looks way off south, normally i find them here from 70 -100 euro a piece i very good condition.