LLPiano, Sigasa - i am interested in your findings.  i currently use an older set of K240's which i think are outstanding.  I was thinking of switching over to the K271 because it supposedly "isolates" better than the 240, which i guess they call "semi-open".  my studio in my basement has a noisy heating system.  so i either gotta freeze and wear fingerless gloves like Bob Cratchett, or i have to hear the drone of the blower fan over my playing.  I was hoping the "closed" 271's would give me a better solution.  
so i guess i'm asking if the 240 has a better/wider response than the 271, or are they basically the same.....
or maybe i should look at the HD 600s? 
anybody got any other ideas for closed /isolating headphones that are comfortable and sound great for solo piano playing....?
EDIT:  or maybe i'm not understanding the terminology- is "isolating" referring to others not being able to hear what i am hearing in my headphones (whereas open means they could if they really tried..), or is it referring to isolating the user from outside noise.  I know that is what "noise-cancelling" h/phones do- but to me they really sound artificial is you aren't in a particularly noisy enviroment....
						Last edited by boehnbr (04-03-2010 19:29)