You have had a lot of nice equipment. Have you ever just ran straight solid state? How has your terminator compare to other DAC's in the past?
When I first built the NX-Oticas, I was using a Parasound JC2 preamp and JC5 amp. These are fairly nice products, but as I got into building my own gear, I found I liked my DIY builds better. The preamp I am currently using is still solid state, although I have a couple of tube preamps under construction.
When I first built the Purifi monoblocks, I was using the Neurochrome input buffers and only later replaced these with tube-based buffers. I also used my SS preamp with the Pass XA60.8 amps on the NX-Oticas, as well as the Neurochrome Mod286 monoblocks.
I've heard some exceptional solid state gear and I'm sure I could find SS equipment I'd be happy with. I will probably try to build more of my own in the next few years. In fact, I am currently building a pair of class A amps based on the new F5m design that Nelson Pass introduced at Burning Amp last year. I plan to use these to try out bi-amping my Line Forces with an active crossover.
The Terminator Plus is easily the best DAC I've owned, but not a huge difference over the original Terminator that I had before it. I haven't owned that many DACs, but over the past ten years, I've also used a Schitt Yggdrasil (which I still have in my workshop system), the Aurilic Vega G2 I have in my bedroom system, a Wyred4Sound DAC2, and a Levinson No 39 CD player (which I bought back in the late 90s).
The Terminator Plus has a very relaxed feel to it - very smooth yet detailed, with exceptional sound stage. I don't really have any complaints, and this is probably the last piece of gear that I would replace (except my Line Forces which are here to stay for good, at least until I have to downsize).