It really depends on if you are going to stop playing the game after getting that achievement, if so then it really isn't worth the money/points.
However from the Cerberus Network you get Zaeed, a visit to the crash site of the original Normandy, the Firewalker Pack (where the Hammerhead was first introduced), Cerberus weapon and armour, and lastly the Arc Projector heavy weapon.
Still a little pricey for 1200 points but they'd prove their worth over more playthroughs.
Wow, well ME2 is my favorite game and ill do a couple more play-troughs i didn't know you got all that i still got 1300 points ill probaly get it. Also, i love the gamer pic can't wait to see the movie.