The slant of the article in XYZ Computing is systems for running Linux. However, if you're a Windows person, don't let that put you off. At least some of these systems are Vista-capable now and more could be. The same goes for Apple's OS X, should Apple decide we deserve an update to the Mac Mini. (Though they don't seem much interested in being a computer maker any more - a story for another time.)
I like some of these machines and all the small form-factor boxes I have seen have show at least some interesting features or performance points. These could well be the future of desktop computing for the majority of us, who need some power, but not the maximum available.
Have a look. It's a short read.