So I have this of Bose, and I was thinking about grabbing the ATH-M50's. I'm just wondering if that's good upgrade, or more of a side step. I listen to mostly orchestra, but with a little heavy metal and electric thrown into the mix.
The M50 is great for the latter, but as the previous poster stated, they are not that great for classical. There is too much uncontrolled bass in my opinion and not enough shine on the mids which is where classical music comes alive. For you, if you're willing to sacrifice the pretty darn good isolation of the Bose, I'd be looking at some open cans in the price range. AKG, Grado, whoever you chose, that's what they are primarily good for.
One thing though, any phone you're looking for in the price range isn't necessarily going to be "good" for both (I say good because it really comes down to how you like the music to sound). Classical, electronic and metal are very different in terms of what important range the "music" mostly takes place in. Classical is mids and highs. Electronic is very bass demanding, and at times calls for mids depending on the type. Medal is mids and bass.