Duncans on mh100qmnt?
It's pretty much worth it. I threw the JB/59 into my MH100QM (Floyd) and it sounded like a whole new guitar. I'm not sure about EMGs though, I know someone put them their 100 series LTD.
I'm more into SD, but if wood is a crap it's better EMG.. but you said that sound is good...
Is the sound brighter or darker?