May I suggest NAD gear. The newer stuff is warmer than your Adcom but closer to neutral. I have used 200w/ch B&K amps, vintage 150w/ch 80's Denon seperates and 80w/ch integrated, and 125w/ch NAD seperates, 125w/ch Marantz monoblocks with my Klipsch Fortes, all neutral/warm with great success.
Here is a great affordable combination:
http://www.audiogon.com/cgi-bin/cls.pl?preatran&1309977614&/NAD-c165beee-with-phono-input-
with
http://www.audiogon.com/cgi-bin/cls.pl?ampstran&1309979007&/NAD-C275-Stereo-Power-Amp
You sure don't have to spend $3000.00 for the Fortes to really sing.
Bill