My comments arnt going to solve your dilemma but I can tell you what I think.
Im posting this from the PS3 so I will start with that. Dont so much think of the PS3 as a gaming console, and think of it as more of a piece of AV equipment, it can do allot more than just play games, and when it is used for other things it can do it with quality, a friend of mine is useing his as a cd player, and you might think that is a waste but seeing as the cd player he prefers it agaist its quite a compliment (its a Rega Jupiter worth £1000 new).
Also the PS3 is just getting started and getting better all the time.
Now for the 360.
The 360 is just a console, every thing else it does arnt selling points, but seeing as games are the main focus for the 360 it does them very well. If you do get one get the elite, mainly just for the HDMI out, as games like Overlord and Blue Dragon look great in 1080p, I know Ive not gone into great detail about either console, as both do a greate job of entertaining, but if it was down to just one console for me I would go with the PS3 every time.
BTW I own both too, so no fanboy notions from me.