I just bought myself a pair of DT770 pro 250 ohms, I think they're wonderful.
They're pretty versatile all around, I use them for gaming, music, and movies. I'm also an avid listener of dubstep and I have to say the 770s do a really nice job, they're not really heavy on the bass, but they're just on the point that they give a nice bang, but you can still hear the mids and the highs.
I have to say I'm not very much knowledgeable on the technological terms of music, so I won't be able to give you any advice in that respect, but these were the first higher price grade cans I purchased (a week ago) and they've blown me away. I've chosen for the 250 ohm version, because they sound really good without an amp (imo) and they'll sound even better with an amp, when I finally get my money together for one, so the best of both worlds.
I don't know if Malveaux is going to post in this thread, but I've PMed him about my choice of cans, and he's the one that made me buy the DT770s and I must say I'm not regretting it.
They're within your price range, I think, I bought em off of
Amazon for £126, but I see they're now £115

.
Some other headphones I've considered were the DT990s, but they're open cans, so they'll leak sound like crazy, unlike the 770s, who are closed.
And the Brainwavz HM5 (from
Amazon) (or from
mp4nation, they come with a stand, and you have the option to select an amp). I haven't heard these myself, but I heard they're a real bang for your buck, thought a bit less bassy than the DT770s, more neutral, but then again, don't take my word for it, I haven't listened to them myself, this is just based on what I read.
Also, since you mentioned gaming, the mic I'll be getting to use with my DT770s is the
Modmic, it's currently without a mute function, but they said that by the end of October they should be ready to start distributing the modmic with a mute function. I don't have it yet, but I'll be getting it for sure when the muteable version gets released.
Well.. That's my knowledge so far.
Good luck!
EDIT: Forgot about comfort, I'm using the stock earpads, that came with my pair, and they are pretty comfy, I get times that I just want to take them off for a few mins, but that's no biggy, I mean I can use that to go to the toilet or something, rest my eyes a few seconds. I haven't tried any other pads, but I know they're out there. So in short, they're really comfy, but I have had a few times that I wanted to take em off for a few mins and do something else because they were getting a bit annoying, this was after a good number of hours though, mind you.