I wouldn't want to go above the 250EUR mark for now
I've no experience of the headsets you mention, but wanted to comment on that quote.
If you intend to buy a more expensive headset later, than my advice would be to wait until you can afford the more expensive set. Not much point buying one now, and another later......get the best you can afford...if that means waiting 12 months, then so be it. Use the school ones until then.
dp