Welcome Nand_T! It is nice to see another stereo fan amongst the HT group that bigjohn mentions.
Of the mfg'ers you mention, the Adcom is one I have had the opportunity to play with - though not that model. My thoughts are that Adcom is a very rugged piece, well suited to driving almost any decently designed speaker. The Adcom you mention was first released in the late 1980's, and ran for about 5+ years as a current model (if memory serves). Assuming the amp is in good shape, it would be a good piece, but of course will not have all of the latest bells and whistles.
Adcom is in a class with NAD, Rotel, just above the mass market mfg'ers that focus on HT. However, no mfg'er can afford to ignore that market, and many of the high(er) end mfg'ers also are working to provide products in that space.
One thought, if the Adcom has pre outs, you could use this in the future to feed a larger amp if required. But your features want/need list will determine the course you take.
