TAG McLaren 100x5 well 2 in this case Help

Hi Over the last 7 months I have been helping a collector get rid of his mountain of amps and one of them he dropped off is a TAG McLaren 100x5 set up for two channel and even at that  sold for $2600 back in 2000  I pulled out my B&K Ref 2220 (which sold for half the price new to be fair) and wow We shall see and granted I am using a Ref 30 preamp tuner but it makes me want to try on of there P20 preamps I know they were considered fairly high end and great with music as well as HT but I can only find reviews form over seas and few American like Audio but the thing seems very impressive Anybody know anything about them? Seems to sound really good  thanks