Anyone know how good Sennheiser HD 25 SP headphones are? I saw them for £50 at some shop nearby and thought maybe I should pick it up before its gone. £50 seems a lot more affordable than £80+ for some 280HD's. I'm not an audiophile either so I don't know if I'd notice the difference between 280HD's and HD 25 SP's. My only complaint about the latter is that its rather cheap and flimsy looking.