So many people would love a Class D type, all tube, rackmount preamp. One with nice recording features:

1) stereo returns in the effects loop (mono send)
2) good speaker emulation on the REC out (stereo)
3) seperate MAIN OUT (no emulation)

4 to 5 12AX7s should cover all the features.  No power tubes or huge OT needed.

The world is your oyster Nik!

I had a dedicated preamp in mind though, no power amp section, no big OT.

Something with stereo returns and stereo record outs, with speaker emulation. Boogie and ENGL have such units. They've been making them for a very long time too.

Preamps fell out of favor after the 1990s. I still have no idea why. Many companies, like Matchless, Soldano, even crappy Marshall made preamps back then.

I'd be interested in a rack mountable Pre Amp in the Dumble style.

@ JD0x0: What is "the overtone 5 watt SE"?

Thanks.

5 watt single ended overtone. from what i know it's going to be a simple non-HRM Overtone without the footswitch (just a toggle) theres a posibillity Nik is adding seperate preamp and power amp standbys. I believe there will not be an FET board (not many use it anyway) and i was talking with Nik about adding a bias switch so 6v6's 6L6's or El34, 6550/KT88's can be used to change the tone and  power a  bit

Ceriatone isn't exactly Marshall, Mesa and Voodoo.  You are listing all PCB based preamps that took a long time to deign and layout by a dedicated staff of amp designers.  The PCB layouts themselves probably went through months of revisions for minimal noise.  Ceriatone makes straightforward, basic amp clones.  None to complicated because they have to be turned around in a reasonable time by a small staff, most of which are assemblers. 

It would be easy, however, to scratch build a ODS/OTS preamp, sans power in a turretboard setup, and then run it out.  To start working with parallel returns and speaker emulation is wasting time and money on developing for complicated issues that can better be handled by outboard equipment.  If you went stereo returns, it means you will be using stereo rack effects, why bother with the superfluous extra step of sending it back to the preamp for nothing more than the speaker emulation, which is the only thing that would come after an effects loop.  Let the effects processor handle the emulation or a dedicated speaker emulator which would allow a lot more options that could be hard wired into a OTS preamp.  The point behind rack systems being modular is to mix and match the best tools for each job.  A pro setup will use preamps, then effects, then a speaker emulator (software or hardware) for recording or a power amp for live performance.

If you can find the right tool, just build it yourself, the resources for the preamp and parts are easily available, just stop before you reach the PI, and quit whining for your own highly specialized swiss army knife.

Ceriatone doesnt do complex PCB designs like that dude. If Nik were to make a OTS preamp it'd be a simple 1 input, 1 output, no fx loop, basic OTS tonestack design.

Adding all those features would be too complicated. Nik mostly builds amps that are based off vintage designs. Basicly all pretty simple designs the OTS being the most complicated.

If Nik could even add those features you want he'd have to make the price much higher, where you'd probably just be better off with a mesa or similar preamp, if youre looking for Dumble tones you gotta stick with the original design, if you want to get close, consider modifing a mesa preamp

the early boogies (mark I) were pretty much ripoffs of howard's amps

You  strike me as someone who wouldn't know Pulse Width Modulation from a Permanently Withered Moron. You might be able to describe the difference  between a non-inverting vs an inverting amplifier stage. The concept of a virtual ground might be pushing things however.

An AB763 too long to build you say? Geez, I better forget about the Bright Switch for both  channels. A capacitor and switch might take years to add.

Like it's 1980 all over again........, er, ah, 1965 for a DRRI.

You are ignorant sir. amps take hours to build by hand. This isnt a PCB fender that a robot solders together in 30 seconds it's a handmade amp that is carefully constructed. I think you should build an amp before you talk shit. If you had, you'd know how hard it would be to implement the features you want and you'd know how long it'd take, and that the amp would need to be about the size of a small car if you wired it all PCB like Nik does all his amps.