AKG 701 are a bit Marmite. I know folks who love them but I hate them with a passion! - sound is light and boppy, very unsatisfying for me.
I've been on a bit of a headphone journey the last year or so on a hunt for closed back 'phones I can listen to while my late-rising mrs is still in bed.
The best I have found for me are Audio Technica DT-150, PSB M4U-1 and B&O H6.
The B&O H6 are a bit bass light but very open sounding, especially for closed backs.
The AT DT150 are very spacious but just a bit vague in imaging.
The PSB M4U-1 are very solid sounding with the best defined and deepest bass, but the rest of the spectrum is excellent, too - a very dynamic presentation.
My search is over and I will be keeping all 3 sets, as well as some B&O Form 2a, which are much cheaper but amazingly light and very open and detailed, if lacking in real bass weight.
Critically, for me, all 3 of the above are very comfortable over-ear models - that is the ear cushions surround the ear rather than press on it. I find that headphones that clamp on to your ears rather than your head get very uncumfy very quickly, with the little B&O Form 2a being a notable exception.
None of my choices leak sound to any significant degree.
Comfort is a very personal thing, you really do need to try some and make up your own mind,
And then their are IEMs - in ear monitors - that plug into your ear canal. Sound and isolation can be exceptional but I find them uncumfy.
Spotify Premium streaming, DAC3 NOS TDA1543. Philips Black Tulip 270 pre / Black Cat mono power amps. Speakers: MBL 116F. Atratus3 i/c & Western Electric 16GA spkr cables. ProJect and Nordost Magus power cables
Headphones: AKG 551, JBL Synchros S700, B&O H6, PSB M4U-1,Beyerdynamic DT-150, B&O Form 2 & 2a and Sony XBA-H1 & SoundMagic E10 IEM headphones
2nd system: Pioneer DVD transport, Rotel RP-3000 tt / ADC XLM, Audiolab MDAC, Philips 370 power amp, Klegg Symphony 102 speakers