Just hooked up a Kav300IL to my system last week, bypassin my Proceed AVP-S and Linar 250 but retaining the speakers, cables and source.
In one word, dissapointing.
I also use N804 and N805's and would NOT recommend this as an option. The source is a Sony S9000ES using Transparent reference XL IC's, Audioquest Python XLR from amp to preamp, and Transparent Plus Bi-Wires for speakers.
I have however, heard the kav300IL in a system with Vienna Accoustics Beethoven's that sounded very nice, but only at lower volumes.
Good luck.
Greg Swoboda