I was just in LP around Thanksgiving, and there is no doubt in my mind but that should be your destination. CM is just too big for me to be interested (I was there in '09, but don't really want to return). Now when in comes to LP, I'd go again tomorrow! I much prefer the under-developed places much more, and while both are fairly developed, LP is just nicer and friendlier. Food is good in both towns.
If you do decide on LP, don't miss the Scandinavian Bakery (best pizza in town). The Indian place is also very good (I just forget the name). Both are right on the main street of town. One place to avoid is the Coconut Restaurant - terrible food!