Yamaha audio refurbishing

I would like to have my Yamaha audio gear refurbished after 15 years storage in original packaging. This is all equipment I purchased new in January, 1980 along with my ADS L-1530 loudspeakers and ADS C2000 bi-amp system control. Recently had all the 1530 drivers and crossovers rebuilt and I am ready to have my amps and preamp along with the C2000 serviced and refurbished as needed. I have a C-4 preamplifier and two M-2 amplifiers.  Can anyone recommend a shop they've had a good experience with? I'm located in the Pacific Northwest.