I tested the SRH440 and everything was fine, fit and finish was way higher than what its valued, sonic quality was outstanding, plus it is closed so it makes it even nicer...
Sure you can mod it someday from Closed to open, but the thing that made me choose another headphone was the cable!!!! I hate em!!!...looks like those telephone cables

But if I were to buy Shure, I'd get the 840 and 440 everytime
my advice is,
learn the characteristics of the amps u are planning to get vs the ones u already have...if you have a 'warm' amp already, no point of going warmer... try to get an amp that might suit the octaves instead...
try to get those rechargeable built in batteries amp...something decent like the Ordnance .22 or the E7...
and last advice, try to plan ahead, for example get an amp you can live with for another 2-4 years before you upgrade again...
and don't forget to get a decent quality interconnects...trust me, it helps eliminates the squeaks and output distortion if u plan to move around...
newbie...n i think i cn live with it for long timeeee...but just wondering if igrados n d grado family cn be driven ...
suit the octaves? i dun understand again...