I spot a setup!! ;)
You are correct that I favour the source. However, I can not tell you what your budget will allow, you now that stark reality better than I.

Honestly, I liked the speakers (50 & 60) and because of the demonstration quality, would be pressed to choose. I originally heard the 40-50, and then went back for the 50-60. I would guess the 60 would be better, based on the design and price. But as I have always said, price can allow products to be better, but does not guarantee it will.

As for the source, I would have to say that it depends on the source you are using now. Do YOU think it is good? If so, then buy the speakers. If not, then upgrade the source.

How is that for a good no answer, answer?!?

Regards,

BBIBH