Jesoi,
I sent you a PM about the used NAD 7240 PE receiver. This was the successor model to the one you are looking at, and more powerful I believe. Even though it is rated at a modest 40 watts, it has a short-burst peak power auxiliary power cuircuit (Power Envelope ) that allows it to perform at a much more powerful level, performing more like an amp of double the rated power. A great value. I have happily used the NAD 7240PE since I bought it new in 1986 as my starter amp and can't bear to part with it.
Rob