I've been recording a cd with my recto preamp, and have loved the results. The first 70% of the guitar tones were used by having the preamp going into my 50/50 and then into a mesa or marshall cab- the last 30% have been using the preamp into my engineers di boxes, either clean or with an eventide in the chain. I've loved both methods, and have gotten spacious cleans and chunky cruntches too- but it's definately not metal so I can't really speak to that world. I love the 50/50 with it outside the studio too, but really want to pair it with a recto 2:100 power amp in order to access the ultra heavy modern mode on the recto preamp. 8)