I live in the U.K and can't really get Hulu through a PS3 app just on the computer, so don't really watch much on there. Netflix is the best but you got to get unblockus with it so you can open up all the different regions catologues. I was on Brazil's last night and theRe are a few good 2013 films up on there. For some reason Brazil get the best movies. I like the U.S for the boxsets of tv shows. I haven't been on my own catalogue for a while so should really see what has been updated, but with so many catologues there is always something to watch on there. So Netflix all the way and the picture quality is amazing through the PS3 app and flawless and I have a slow connection, but through the PC I have found it has it has its glitches.
Get Netflix, Hulu Plus, and Amazon Prime (and HBO Go IMO). To be completely honest the only thing Hulu Plus has going for it to me is the complete Cosby Show series. Once I finish that I might cancel it. At least Amazon Prime has my beloved Degrassi and Sabrina (commercial-free). Netflix having Buffy and Angel alone, though >>>>>> so if you can only get one, get that.