Hello i have read many many thread about an upgrade from akg k518(LE), but i'm not be able to decide what are a good headphone for my.   What i whant are this requisites:   - Good isolation but not totally, i ride in bicycle but i get underground - Possibly balance but if sound more...

Hi at all, i'm new of head-fi, I have read many reviews but I’m confused of what are a best headphones portable for the pulmann or train.   I have a budget of 50 € = $70,22 = £44,01   I look for the sennheiser px 200 II, portable + moderate isolation + good sound(I think, never try)  ...