I have been running a Marantz 2270 (70w into 8 ohm) with my old C39s, and it does a fair job but it is on the fritz.FYI - two 130Bs, N1200 crossover, one 175 potato masher.1) what would be an appropriate sized (watts per channel) for these speakers? I don't want to under, or over power.2) I am looking at the McIntosh MA 252. Is that okay? Appropriate?Any thoughts would be very helpful.