For that price range you have a ton of great options! You mentioned that you'll be using them from home a lot, do you prefer open or closed back cans like the ones you have now. Closed cans are known for the isolation and typically better bass. Open are more well open lol with better soundstage and depth.
HE-400 $399 (new) Overall best sounding headphones I've ever owned or listened to. A little on the heavy side and zero portability but for home use the best.
Beyerdynamic DT990/250 $199 and under (new) there is a 32ohm rated version but since you already have the e11 no point waisting an extra $150 for the same thing. Fantastic headphones top to bottom and the most comfortable cans I've ever tried.
DT770/80 $149-$220 (new) Fun cans, super comfy and will handle all types of music well. Soundstage rivals that of the open cans and is better than any other closed headphone I've tested under $700.
COP's $189 (new) are good for the money but not sure I'd recommend them. Def would not use them with the e11. I actually did while testing and it wasn't a good experience... Great at low volumes but raise it and all turns to mush. Highs crack lows fall off and general sadness kicks in... I wanted to love these headphones and at low volumes I did. But I couldn't let it go that while cranked even a little they broke lose.
M-100 super hype headphones are still new but I posted a review from a trusted source in this thread so you can read more about them. $300 is a bit much for what they are IMO. Super super wide soundstage HUGE BASS and that's about all there is to em. Do your home work...
Audio-Technica a900x. $237 All arounders with great sound comfort and price. Definitely worth a serious look!
Denon d2000's $299 and under Amazing period
Lets us know what you think,
Great advise bro. You hit the nail on the head in regards to the COP and the E11. My next purchase will be either the DT770-80 or the M100, but I'm leaning more towards the DT770-80.
Will have to cope with the COP until funds are available.