The model(s) you are looking for are called:
STR - GX40ES
STR - GX50ES
STR - GX60ES
These units are all Class A amplifiers.
I have the GX60ES unit, which has 130 watts at 8 ohms up to 240 watts at 2 ohms. I am the original owner, bought it in 1990 for about 900 dollars! (I also have the ES series CD player)
I am getting the 60 repaired at the moment (I lost the left channel recently) and should have it back in a month.
I have seen all three models for sale on various sites, any of them would be a worthy addition to you set-up.
Any information you might need just email me.