I bought a PS3 in '09 and have been very happy with it.
I've slowly learned to use a lot of the functions with it.
Obviously, I use it for gaming (God of War, Final Fantasy, Modern Warfare... just started playing Skyrim yesterday!). But I also use it as my DVD player and I stream Netflix Instant through the PS3 (you can do that on most gaming consoles, Vizio TVs, probably some others) - which is amazing stuff.
I have a wired connection to my PC and use the PS3 to pull photos, videos, and music through to our living room TV when we have family & friends over. I believe you can do this with a wireless connection too... though I'm not savvy enough to know how to do that. I've also used Amazon.com to view some videos instantly when we want to pay for something. And, I just got the YouTube app onto my PS3 so we watched a bunch of Muppets videos & Christmas videos & (don't laugh) Taylor Swift videos over the Christmas break.
I've heard that XBox is the better system for pure graphics of gaming... although I did read about some "red circle of death" thing when I was researching back in the day.
Wii is a cartoon-y system. Wii is for girls & kids. (Sorry, I'm sure this will offend somebody). I've heard Wii-U is a graphical upgrade.
I give my PS3 a 10/10... love, love it.
If you consider using your PS3 for more than just gaming, I think it'll be the winner for you.
But I'd love to hear what other people think about their systems too.