Interesting discussion. I agree - an all tube head slamming into that NV cab is magic. And, I believe the NV412 is still in production (at least is still out on the website). I'm experimenting a bit as I love the tone of my current rig (Sadowsky RV4 --> SB300 --> NV412) in some situations. In others, though it isn't exactly what I'm looking for, which is a more old-school tone. I bought a P Bass along with some Ampeg cabinets and will be mixing/matching them to experiment a bit. I want to try:
1. PBass --> SB300 --> NV412
2. Sadowsky --> SB300 --> Ampeg 212AV (x2)
3. PBass --> SB300 --> Ampeg 212AV (x2)
Will be interesting to do the mix/match. I was interested in the 810s, too given my past experiences with the Ampeg. I like the color they add to my tone and I understand (from you, Tim) that the Fender 810 adds color too. The 212AVs are nice - good Ampeg tone, smooth and I like the modular setup since there are times I have my kids and can't transport a bigger cab...