Tube Preamp - What to buy?


Looking to take my first venture into the tube world and going with a tube preamp.  My budget is up to $2500 and willing to buy used or new however realize with my budget that used is probably a better path. I would like to have a built-in MM phone stage.  I am use to having a remote and tone controls, so that would be nice however not a necessity.  

For further information my speakers are Revel Performa3 F206 and the current amp(s) is Conrad Johnson SA-250 and I also have a Rotel RB1552.  I many be looking for an amp upgrade in the future, but one thing at a time. 

So far I have been looking at used Audio Research and Conrad Johnson preamps but very open to opinions on brand and model.  Thanks and I look forward to your opinions and experiences.  
speter04
What you are looking it are good choices audio research is the best tube pre amp i have heard the other was a used audioprism, which is another alternative to the others also a good used sonic frontiers would also be an option.
I recently got a Don Sachs DS2. By far, It’s the best component upgrade I have made to my system. Don is semi-retired now so it’s a 10-12 week wait to get one once you're in the queue. I highly recommend it and the cost is only slightly over your budget.
A used modwright LS100 might be in your budget. Great preamp in that price range. Not too "tubey" sounding, but has the tube magic and responds well to tube rolling. 
Unless you can get one of the above name brand pieces used you can see if you can get something from the Backert labs line used. But all that may be a stretch. Integrated would be a good way to go. But if you are happy with your amp, for a starter tube preamp you can’t go wrong with a Schiit Freya+. You will be way under budget and have some money remaining to get a better than starter used phono stage.