try craigslist for a decent brand like sennheiser or AKG or audio technica

if 50euro's is like $100 you can get a pair of akg 240's which are classic studio cans. the akg k49's are about half the price and decent but truly not in the same ball park. the thing w/ headphones is how they fit, is as/more important than quality, if a compromise must be made. it doesn't matter how good they sound if they hurt your ears.

The 240's are around £100 over here which is double my budget!

sorry i didn't know what the exchange rate was, don't wanna be one of those cats that always just recommends expensive stuff to people who don't want it. the k 49's are nice, the sennheisser hd 205s are good, after using both, i like the k49's better.

i haven't used any of the ones your thinking of so it's impossible for me to say, but based soley on the reputation of their products, i'd go monoprice if i were flying blind. i've used their pre made trs cables, adapters, and, connectors and they are good. they feel sturdy and are well built. they're condenser mic also got a positive reveiw in tape op. based on they're other products i wouldn't hesotate to go w/ them for any sort of budget/utilitarian product. that said sometimes companies that make stuff on the cheap tend to only have some things that are good, and some that are really cheap. so far i haven't heard anything bad about any of their stuff. as long as you have 30 day return policy you should be fine.

also, before you judge, you should play music thru them for like a week straight at average to slightly above average volume, so that the drivers break in. this could make a significant difference in the sound. the bass response should deepen as the drivers loosen up, and the mids/highs could smooth out.