Try to get real used to what the NT sounds like, cuz when it gets shodded with the RCA BP's, I want you to say, "Wow, I really can hear the difference!"
Also, you can stick two USA NOS in V1 and V2 in your DSL and try out the other two in the NT. The Magnavox should be plenty strong for the tone stack in the NT (V2). Plus like you said, you have other 12AX7's as well.
If you lived next door (sheesh!) I would make you a custom cabinet. I have a s**tload of speakers right now and I'm working out a deal with Eminence for my very own speaker that I want to call a V123. As you know, I sent Eminence a couple of old JBL D123's. They did all sorts of tests and they are going to try and replicate that speaker for me. I'll be the only one who can sell it. A D123 has huge bottom end and twice the highs of a regular guitar speaker. If you use effects, it's the only way to rock. Anyway, I see a single D123 in a tuned box with the NT sitting on top of it. That, or the 4 by 6 custom cabinet I keep talking about. (He-he!)
Well, at least I got my new toy (2009 Explorer) to play with and of course the screamin' price I got it for
$875. It has the 500 in the bridge and it will literally torch the front end of my amps. (I don't have any active pickup guitars anymore. Just didn't need what they did...more gain!)
See you later, Joe.
Marty