I'm so very torn on whether I like my Q701 more or my new modded Fostex T50rp more.
They don't sound all that radically different, so it's not even that I prefer one over the other for certain genres. They both sound great with everything I listen to them with, but just different. The modded T50rp has a slightly bigger/flatter bass, a more full lower mid-range, with a more gentle treble, but it still has plenty of sparkle and top end detail for cymbals. The soundstage on the modded T50rp isn't even that bad in comparison either. It's obviously not as wide, but it's not ridiculously narrow either. The T50rp seems to have a deeper soundstage placing things more in front(further away). I feel like I can pick out more detail in the mid-range with the T50rp, but I may be wrong. The T50rp also wins big time in terms of isolation, which doesn't really matter all that much since most of my listening is done in an almost dead silent room. I guess it will be a bigger help when it warms up and I have to use my window A/C unit. After padding the headband on the T50rp comfort is great, but I have no complaints about the comfort of the Q701 either.
I still need to get around to doing some A/B comparisons, but this is how I feel after using the Fostex now all week instead of the Q701.
My original goal with the T50rp was to make them sound the opposite of the Q701 and have above average isolation. I originally wanted them to be bass heavy and dark, like an HD650 on steroids. I haven't been able to get the bass quantity I had wanted out of them, so now they ended up being how I describe them above. Now they are pretty much just a little bit different sounding from my Q701, but are more portable. They are different sounding than the Q701, don't get me wrong, but it just isn't as big of a difference as I was originally hoping for.