On the IMDB website (Internet movie database) the Scott pilgrim one got a 7.7 rating from people who've seen it. The Step up 3d one got a 4.2. The Expendibles got a 9.0 (out of 10) and the last one wasn't rated yet.
I would watch the Expendibles, but thats me. My wife would probably watch Step up.
The last one with Farrel and Wahlberg, well, I like Wahlberg but am iffy on Farrel.
Konradrb