Hi kgveteran,
Don't mean to avoid your question on this thread. I noticed your dream system consists of a pair of Magnapan 1.7i's. First let me say that I think Magnapan is a great company who makes wonderful speakers. In the past I've owned and really enjoyed their 3.7i's, fantastic speakers. I now own the Eminent Technology LFT8B's and in my opinion are better than the 3.7i's! They are around the same amount of money as the 1.7i's ($2200.00 vs $2500.00) I would buy the LFT8B's in a heart beat. I can honestly say, after owning both the 3.7i's and the LFT8B's it's no contest. I feel that the LFT8B's are, dollar for dollar, the absolute best value in ALL of high end audio, not just speakers! In the $2500.00 price range I have never heard a speaker that can provide this level of quality. They need and amp with a good power supply that can provide enough high current to the panels (just like the Maggie's) which the Krell you want should have no problem providing. Once they are setup properly, they are simply amazing. Before you buy the Maggie's I would strongly recommend listening to the Eminent Technology LFT8B's.
Your question regarding the preamp was not 100% clear to me. I think you're asking for new preamps suggestions in the $2500.00 price range.
The names that seem to keep coming up as great choices in a tube preamp in that price range are DeHavilland, Arci, Don Sachs and Supratek. The Don Sachs and the Supratek are the two I would look into. They are supposed to be really good sounding and very reliable for the money. Good luck.