Suggestions on Tube Pre-amp. Please

I have never heard them, but the Rogue preamps have a very good reputation. I have heard the Rogue 88 amp, and it offers great sound, I would expect the same from the preamps.

There is a Canadian company, Space-Tech-Lab, that sells direct. They are GIANT killers in my opinion. They are point to point wired and they can build to suit your needs.
Outstanding value and priced right. Call Albert he is the designer and builder of these tube amps. They also offer a 30 day in home trial.

I also agree that you should give a Rogue 66 a listen. There is one for sale right now on audiogon (centurymantra member). I used a Rogue 66 for about a year and loved it and then decided to move up to the Rogue 99. The Rogue customer service is outstanding which is another reason I recommend a Rogue pre. Good luck in your search and let us know what you decide on!

I have the Rogue 66 Magnum and I'm very pleased with it.
If you buy a new one, you will probably want to replace the stock tubes but other than that it's, imho, one of the better values in audio.
And yes, customer service is some of the best I've encountered.

Sonic Frontiers line 1 should work well. The Sonic Frontiers preamps are some of the least tubelike tube preamps.