Which tube preamp meets all these needs?

I believe a Sunfire Classic vacuum tube preamp might fit the bill. I had one a few years back and it was quite good! It has balanced outs, but I don't think its completely differential internally, but for under 2k, that probably isn't going to happen. It also supports a phono stage, while mine didn't have the card, it was also supposed to be pretty decent. I remember the pre was quiet, and added a nice touch of warmth to my system, which is what I presume you are looking for.

Ericjcabrera, an Aesthetix Calypso has everything plus remote phase switching ,used between$2500-3000. Tube rolling gives big results with 12Ax7WB imput and 6922 output and because of the many choices available in these two types the sound is very modifiable.

I suppose I can be a BIT flexible on #5 if that opens up the options. However, I'm confused by the BAT responders. The vk5i has a unity gain, I think, which is an HT bypass. However, I thought that the Bat vk3ix remote did not have source switching. It would be odd that the older 3i and 5i have it? What am I missing?

The Audio Horizons was recommended to me, but this isn't fully balanced. Thanks for the rec on Sunfire Bostonaudi, but I do want fully balanced. Should be possible in my price range (I hope). My current preamp (Simaudio P5) meets all of these criteria, I got it for under 2k, it's just not a tuber.

Thanks for the responses so far - keep the help coming please.
-Dave

HT bypass can mean different things. If all you are concerned with is "unity gain" that is fine. But in this mode does the input get hard wired directly to the output or does it go through active circuitry first?