Upgrading from an AKG 612Pro

[bariseray]

I've had the AKG 612 pro for a few years now and want to grab a better pair of cans soon. I've been using them with a FiiO E07K. I love how comfortable and light they are and think they are a really good pair of cans for the cost, however I've been thinking of getting a new one for a while since I've had them for so long. 

 

I've got a budget of around 250 dollars. I was thinking of the Sennheiser HD650 or Audio-Technica ATH-AD700X. Would this be a good upgrade from what I have? I use it primarily for gaming and listening to (non-EDM) electronic music. Would the hd650 require a better amp dac than what I currently have? 

 

Any other open ear headphone recommendations are appreciated.

[SSL]

Might not be an upgrade, seeing as the AKG line of K6--/7-- headphones are a little cleaner in the bass. The HD 650 has more bass, though. So, it depends on your personal preferences. The K612 is a good headphone for the money so I would hesitate to upgrade from it unless you have specific aspects of the sound that you want to improve.

[Hoof]

I'm inclined to agree with SSL. Unless you're planning to drop close to double your budget, the difference in quality just doesn't seem worth it.