The thing is is not a question of wich one i want.... In this case the 250ohm is my only option....
Rewinding.... As i said before i mostly use portable sources yes.... If i was going to choose a brand new 770 i would of course be choosing between the 32 and 80ohm version.... Thing is.... The 32', 80 and 250 versions cost around 150 euros new.... I have a proposal for a mint condition 250ohm one with, box acessoriies, invoice (still with 1 year and 3 months of warranty left) for 80 euros.... So basically, the only reason i am considiring the 250ohm one is because i can get it for half the price of any of them new.
About the sonic difference between the 80 and 250 version.... The differences are very noticeable? How stonger is the bass on the 80 and how agressive are the mids and highs on the 250 when comparing botth...? Wich has the more pleasant and best all rounder sound? Specially for pop, rocj, indie and edm (trance and progressive mostly)?
"Aggressive"? As in how strong treble peaks are? Every version has a big 9k-10kHz treble peak - in fact, most closed-back headphones do. It doesn't bother most of us. Peaks in the upper midrange aren't terribly different between the various versions, and they're not overbearing, at least to me.