Well, if you DO want a Mini - you really should wait for the upcoming refresh. Keep in mind, it's not very likely the Mini will be updated to ship with a Blu-Ray drive this round - as much as just about anyone here would like that to be. (if anything, Blu-Ray will first debut on the expensive hardware first - Mac Pro and what not)
Even if you don't game - the PS3 is still cheaper than most dedicated Blu-Ray players on the market. Granted, I AM a gamer (console only) but my PS3 spends most of it's time with video playback (via network), occasional music, and then Folding in the colder months. (its a great cancer-curing heater) So in short, it's more a media center, and that is certainly how I use mine.