Hard to beat coincident LD's. I've run my sm69 fet a few times so far - getting ready to take it on the road for some outdoor Ratdog/SCI. I like sound through the V3 or straight into the 744.
DR FOB has a USM69 - w/ the control wheels on the body of the mic. The sm69 has a seperate control box.
Run it Blumlein or M/S - full and spacious.