Paul, how are you. I used ARC LS-15 with my DNA-05 Deluxe with great results, but it does not have SSP throughput. But the newer LS16 does. ARC tube preamps have a very open sound that is a good complement to McCormack amps. I now use my LS-15 with DNA-125 and I love the way the Research sounds with McCormack. I also heard my friend's system, Sonic Frontiers Line-1 with DNA-125 and the results are great. Very smooth sounding combo and Line-1 has SSP. Also try audio assylum for suggestions(search the posts there). Best of luck.
