The time has come. I want to buy a pair.

First question: Which should I buy QC3 appears to be 'on ear' unlike QC2 which is 'around ear'. Is one better than the other?

Second question: Where can I buy some?

The next 6 weeks sees me at GLA, EDI, LHR T3, DOH, BKK, SIN, KUL, CNS, BNE, SYD. Can I pick them up at any of these airports?

Where are they the cheapest? And what do they cost? Bose want £225 or £275 (QC2 / QC3). I reckon I can beat that.