The 2270 holds up very well, if you can get one that has been treated descent. I own several Marantz receivers and enjoy them alot. With the right speakers and table, they can sound very swell. They are built like army tanks. At some point the power supply caps should be replaced, but I haven't done mine yet. The 2270 has 70 watts RMS per channel and will smash any new amp of the same (and questionable) power rating. If you get one, clean the dust out, replace lamps and spray the pots with CAIG. You should be good to go.
Good luck!
Wayner