whats the status on the newer XP-M's

i had read about 3 or 4 weeks ago(about the time that i bought my 2600+xp-m that the newer 2500+xp-m's werent doing as good. the stepping that was specified was AQXEA, and im not to sure about the week. whats the current stepping of ones coming from newegg. and how are they clocking(and how about the 2400's)

from reading ive seen that the 2500's are clocking the best , with the 2600's in a close second. but as of latly the 2400 had slipped. taking much more Vcore to hit good oc