Hello,

I need some feedback. I have a Hafler XL-280 and found a place to do a total upgrade which looks like it will really make a big difference: link for upgrade: http://www.musicaldesign.com/mc_amp_mods.htm

I also have been looking at a Conrad Johnson and other amps, and need some feedback if someone has had this upgrade and knows any results? Also how is the Conrad Johnson 2300A? Price wise the $1200 super upgrade and a used CJ are about the same price? Not sure what is the best move..

Thanks
Dennis

P.S. Also I am using a Yamaha 600 CX RS as a pre-amp, not sure how much the pre-amp needs also an upgrade vs. amp?

Speakers are B & W 9NT's (Love Them)