any reason why you are wanting stock firmware, other than for emergency warranty issues? im running darky's 9.3 + speedmod (ext2 lagfix) + the JL2 modem, everything is like butter, 2000+ quadrant scores, and 48+ hrs battery... its almost boring theres nothing else to tweak on it! :)
how did you manged to get 48+ hrs of battery? are you using a stock battery or different? or you hardly use your phone?