I prefer DiMarzios to Duncans, too.
I've always found the descriptions on their website pretty accurate, and they have some pickups I've really liked over the years - Fred, the MegaDrive, the DLX models, some of the HS and Virtual Vintage series. I agree they're not the best place for "vintage" pickups.
That said, I've bought a brand new DiMarzio which was broken, and that's never happened with a Duncan!