so i did something similar recently. i 'upgraded' to a grado gold on my MMF 2.1. i'm not sure if its the cartridge or what, but i am now obssessed with perfecting the sound. dont get me wrong, grado hum aside, it sounds great, but now i notice more. i am constantly tweaking it. is it possible that the grado gold is just too good for my TT? i adjusted the VTA as best i could last night and i am pretty happy with the sound, but i am not sure if i did it correctly. i'd give the bluepoint 25 hrs or so to 'break in' then do a re evaluation. how do you like your 5.1? i love the old model with that glass platter!
good luck!
good luck!