Interesting. I dont think bass would be a problem on my system as I keep hearing some people saying that even the HD650 is overly bassy but thats not what I hear on mine - thats not to say there is a lack of bass as there clearly isnt but i cant imagine it being a problem...
I just feel like the 650s are little laid back for me, there is seemingly an ever present subtle veil to the sound which seems to subjectively keeps you at arms length from the action.
I even tried a sound processor (a Behringer Sonic Exciter) which does help a bit, but ultimately its difficult to change the fundamental character of the 650s.
So would you say the Denons are good for hard hitting music?
Also, there seems to be a huge difference in price for the Denons when bought here versus say the USA - I've seen them advertised for not much more than $200 over there, but over here, its rare to see them for less than £200, so almost twice the price!