Best upgrade option for this system?

I suspected that the preamp was my best upgrade candidate. I'm not familiar with tubes and will include them in my evaluation. I've noticed from my initial reasearch that not many quality preamps have tuners, and I like Creeper's suggestion to use the GTP-400 as a tuner source. But I would like to find a good preamp with volume remote if possible.

My local dealer is suggesting that I come in to his shop with my Adcom preamp and cd player to run a comparisson test with his Bryston BP6 or 25 and Conrad Johnson PV10. Not sure how valid the test can be since my Mirage speakers wont be involved.

I'm also looking into the Moon P-5. Any thought on how well this unit would marry with the Bryston?

I ran the comparrison test between my Adcom GTP-400, Bryston BP6 C and Conrad Johnson 14LS2. The difference between Adcom and Bryston was astonishing, made the highs much more inviting and brought out the midrange nicely.

The move from the BP6 C to the CJ 14LS2 was more subtle, but I did like the way it held the low frequencies lower and seemed to widen the soundstage.

I fell for the Conrad Johnson! But unfortunately it's a bit out of my $2000 enveloppe. This was my first audition, I plan to keep researching and continue testing until I'm ready to take the leap.

Audio Research seems to be coming up as another interesting tube preamp option for my Bryston 3B ST. I've seen references to the LS-3 on A-Gon, but when I look further, there are good reviews on the LS-15 and 16. I also saw references to SP series (not sure what the difference is). In my case, I would require a remote and I dont need phono.

Any thoughts / suggestions?