The Teac NT-505 looks really appealing because of the ability to hook it up directly to the amp. There is also a lot of options for hooking up different digital sources, a NAS and flash drives + headphones. My tube amp uses RCA's and the Teac uses XLR connections. I'm going to ask a possibly stupid question, can I have them both hooked up to the amp at the same time and turn on the one I want, the tube pre will be relegated to phono duty only after I sell the Node 2i.