Hi all, After much deliberation I will be getting some 2nd hand Monopulse Model S in a few weeks. Any recommendations for amplification that work well with Monopulse greatly appreciated. Will be in a fairly large 30ft x 20ft room. I use Spotify and Apple TV as source, so I'll need a dac, amp or that rare beast, an amp with built in dac, 2nd hand is fine. Regards.