For my system the Psvane Treasures fron Grant Fidelity are excellent with the C2300 good as my NOS tubes For NOS the Brimars work very well, just make sure they are the ones in the black and red box's not the red and yellow boxes which are really poor sounding compared to the ones in the black and red box's. Brimars are very musical sounding. Did not like Tele's smooth plates as much as the other two above. Bugle Boys just sound thin, same as 5751's. Might as well purchased solid state with those tubes in the C2300. Great preamp regardless of cost and their designs are so good that they don't need to changes models a lot, like ARC does, guess they cannot build it right the 1st time.
