Well I thought those cans might isolate better than on-ear open headphones because these are full sized. I'm not fussed about leakage, I need something that I can use outside/in loud environments though. Jude also has a PX360 and HD448 review from his sig, and he's compared them, and I think you're paying for the design with the PX360 as I said earlier. I don't know what I should get.
Hmm I might have to disagree with this on a few points.. and this is coming from someone who owned both and sent the PX360 packing because I preferred the sound signature of the HD448.
Their sounds are very different, and their functional physical traits are different. The PX360 folds, is lighter weight, and isolates better (this is probably why I think it is easier to drive).
The 448 is rich in the mids and laid back while failing miserably at bass texture (unamped).. although the quantity is just fine. The highs are also very tamed/rolled off.
The PX360 really hits hard in the sub bass, has drier, more recessed mids in comparison with a hike in the treble... giving it a very specific sparkle.
So yes, I do agree you are paying for the solid design of the PX360 over the HD448, but I think the sound signatures are very different... it isn't just physical attributes that differ