Naklee:
Thanks - should the 4 stars concern me and stretch to the z7 TKratz/anyone? Or not worth the extra outlay?
Sounds like I need to demo the yam but the dealer can't get hold of any!!!!
Well, I found the DSP-Z7 to be significantly better than the RX-V3900 and therefore in my opinion worth the extra money.
The RX-V3900 was until recently a 5 star product, until Sony DA5400ES (you should have this receiver on your list as well!) stripped it one star in a group test. I haven't heard the RX-V3900 and the Sony DA5400ES side by side, only at two different occasions, but I believe I would prefer the RX-V3900 on B&W speakers anyday.
This is of course my very personal preferance, and you should really try them out yourself.