I actually did the reverse of this. At one point I had a McCormack TLC-1 preamp with a Sumo Nine + amp with an Oppo BDP-83 as a source. I was watching Blu-Ray concerts & DVD concerts on a weekend. I have to say the whole experience was a good one. I was listening for hours on end. I didn't get much done @ all. It was a very musical non-fatiguing set-up. I can only speak for my system but Sumo & McCormack gear had good synergy. They may play well together in other systems too.
