Well, it may suprise people to hear that I use my dual rec for creating a tone somewhere in-between Brian May, Keith Urban and David Gilmore sound...that warm shimmering sound with plenty of sustain. I use a Fender Stratocaster by the way.
I use it with my band live, in the studio and also for session work in all styles. I found my playing style suits Dual Rectifiers more than any other amps, i.e. dynamic touch (very light -heavy), letting the amp do allot of the work . I find that with marshals you really have to hit the guitar hard and have it up very loud. The rectifier seems to break up into overdrive at a fairly low volume.
Just thought I would jump in and break the traditional Dual rectifier only works with metal stereotype.