Hi Amwarwic, I had the 805s for almost 2 years and enjoyed it very much. The 805s and the Proac 2.5 is a very musical combination. The Cary preamp would not be my first choice for these amps. It is just my opinion but I do not think the 98 is in the same league as there amps. The 805s, with a few mods will improve on this already excellent amp.