I don't have personal experience with those boards and have never owned a Burton, but the Social seems to be more of a park board? RockyMTNsteeze's suggestion of the Feather seems like a good one from the Burton line.
boarderaholic did a brief review of the Lipstick not all that long ago http://www.snowboardingforum.com/sno...k-blender.html
I'm around your stats (5'8" 120lbs, athletic build) and I prefer the size range of 146-148. (I had a 151 stiff cambered board prior to a 146.) What's your boot size? If it's rather small or large for your weight - like size 4 or size 10, that will factor in to board length (waist width) as well.
Do you have a set budget in mind?