should I stay with Audio Research LS25 ?

Yes, get rid of your preamp as soon as possible. It's awful. Sell it to me :)

Why are you thinking of trading? Is there something in particular you don't like about the sound in your system?

To answer your question, NO !
Make sure you have a good power cord for the ARC and good tubes and enjoy it.

An ARC LS26 is being rumoured to be replacing the LS25 Mk. II shortly.
It is apparently a scaled down ARC Ref 3. If precedence applies, it will have the same price tag as the current LS25. And if its sound is related to the Ref 3. . . it will likely prove to be quite delicious!

Is your LS25 a MKI or MKII version. I currently own the MKI (with NOS 6H23 6922 tubes) which I prefer to the MKII version with its FET/6H30 hybrid confguration.

In any event, I would keep the LS25.

Thanks for the input.
First off it is the MK1 version. As for tubes, I am new to this game and find it a bit confusing as to what dose what.At present they are GE electric 6DJ8 in the back and Russian 6922 in the front.
My thought about going with a Rogue pre-amp was for synergy and possibly a quieter background. I've noticed when running the amps dirrect from my cd player that they are almost dead quiet compared with having the pre-amp in line.

Kabir:

With the 6H23 NOS 6922 tubes, my system is dead quiet with the LS25 volume at the maximum setting for CD playback. With my Phono playback there is a very slight hiss with the volume setting at the maximum. For replacement tubes you may want to contact Upscale Audio and talk to Kevin Deal.