>>107734191
No. They used to be recommended here 10+ years ago, when there was nothing better. Since then chi-fi flooded market with actually good sounding iems.
Get porta pros if you want zero noise isolation, mud canons and mediocre comfort, or if you want to larp as an oldfag (rockboxed sansa clipp required).

porta pros are comfy enough if you happen to be bald or wear them with a yamulke

No they aren’t. If your looking for studio grade headphones i’d recommend Sennheiser although you need to purchase an adapter for them if it’s for a computer

ksc75's are actually pretty good
portapros just dont sound very good youd have to tune them, too much bass AND peaky treble

For the price definitely but they're not gonna change your life like some people make it sound

>>107734191
All the good ones are "semi"-openbacks based around the same or modified driver, for under 50€, best bang for your buck out of that price-range for non-IEM and non-Chinese options. Cable is shit and not removable but they usually have good warranty and there's some mods for that on Etsy or Ali. Kcs75 is more "bright" with almost no subbass while Porta Pro and KPH30/40 are more traditional with the bass. You can get more bass for the latter with YAXI or other thicker aftermarket pads, KPH has a more traditional band that pushes against your head more so it should have more bass.
"Semi"-openbacks don't block out noise and they're supposed to let sound in and out, these are small so they wont leak to your whole house but people next to you will hear what you're listening to.