speaking from LT1 experience, i love my lm1. i don't think the drone is terrible, rather tolerable to my young ears
i have never personally heard a lm2. i have ridden in an LT1 with a GMMG catback and it sounds AWESOME!!! i like it more than my lm1, it is definitely much quieter than a lm1, you can talk rather easily in a gmmg car compared to a lm1 car, and did i mention its sounds awesome on an lt1?? if you have the money, i would splurg!
doing a quick 1-10 of most tolerable to least tolerable on lm1 vs gmmg i would rate them as:
LM1 - 7.5-8 - it has its times where you won't like it, like trying to talk to a ladyfriend on the highway. only exhausts worst would be a cut out or open headers.
GMMG - 5.5-6 - the ability to talk while driving is nice. sounds great. very tolerable.
Stock - 3.5-4 - just for comparison. its no mercedes or honda note
