I have both iGraods and KSC-75s. I like them both a lot. I seem to grab the iGrados a lot lately, especially if I can carry an amp with me, as they are very good unamped (and slightly better than the Koss), but really improve when amped. That said, I still like the KSCs too. And I'm not convinced the iGrados are worth the price difference. For comfort, they both suck -- but they're not really bad, just not ideal (I haven't found ideal yet...). I find that neither leaks too badly for general portable use. If I'm on the bus or train, I will occasionally take them off to make sure they are not so loud that others would be annoyed, and I usually can't hear anything to speak of when they're off my head (both brands). If you can get the Koss as cheaply in the UK as in the US, it's a great starting point (I picked up a couple pair for $10 each when they were on sale at Radio Shack). If the prices are closer to the iGrado, then it may be worth springing for what I consider the better cans. But, as others have said, a loot depends on personal preference -- I like the Grado sound and not the Senn sound. YMMV