Hi I am wondering about getting a tube integrated. Specifically a Primaluna EVO 400 or 300 depending on whether I decide to splurge or not on the headphone amp that can be added. I am interested in tubes and that "tube sound". I might look into a used one. I might be able to trade in my current integrated, a Marantz PM-14S1 if I buy new from a local retailer. I will be pairing the integrated with a pair of Martin Logan Motion 60XT's which I own. Their sensitivity is 94 db I believe. They are 4 ohm compatible. I have no idea whether this would make a good match or not between the amp and the speakers. Any thoughts? Thanks.