Mine is a Medion Akoya that was on offer in Tesco, September 2008. Because it was ex-display (they'd flogged all the rest), I picked it up for £219. The CPU is an Intel Q6600 Core2 Quad processor and it came with 3GB of (single channel) RAM and a 1TB drive. I wasn't thrilled about the sound, graphics and storage, so I've since added a further 1TB drive, Creative X-Fi Elite Pro sound, Gigabyte GTS250 1GB graphics and recabled throughout. Also, because it seemed to be struggling a bit after I'd stuffed all that lot up its jumper, I replaced the puny 350W PSU with a Hiper 800W jobbie which seems to be coping very nicely. Oh yes... and it now has a floppy drive too!
Modifications notwithstanding, I'd say the one I bought was a good, stable, entry-level machine, but do shop around.