Balanced Tube Preamps I Should Try

You have limited choices. BAT, Sonic Frontiers, Supratek are the few that come to mind. Personally I wouldn't get a tube preamp that has both balanced inputs and outputs.
Truly balanced preamps are always push-pull configuration. Most people will prefer a SET preamp.

No remote, but the Atma-Sphere MP-3 offers superb performance. It has balanced inputs and output.

Supratek is an outstanding tubed pre (says the new and happy owner), but none of the circuits are balanced. Mick will build them with XLR connectors, but it basically would be the same as using an adaptor. BAT would be my recommendation. Remote is an option on these, so check that out. The VK5i would be a great choice. One available now for about $1.750, which leaves plenty of $ for good NOS tubes. It uses 8 6922s and 2 (I think) 5881. Tube life is very good, 10,000 hrs estimated.

I agree on the above recommendations for the MAC C2200, it's a fantastic preamp. You may also want to check out an ARC LS5 MKIII, it's another great fully balanced preamp.

Good Luck!

Mike.

Audio Research LS-25Mk II, Fully Balanced and tube hy-brid