1) PXC 550, 2) QC 20, 3) QC 35, 4) MM 550 (just so ugly)Carrying case - The semi-hard carrying case on the QC 35 is much better than the PXC 550 and seems like it will protect the headphones better. Looks perfect for the look I was going for! SONUne fois la réduction de bruit activée, on a limpression dun son plus enveloppant et plus pur. After attempting to format the drives, they were full of bad sectors (no doubt due to the poor handling/shipping. Returned didnt fit right The first few times My feet got wet, the dark dye stained the bottom of my feet. Felt comfortable. I tried a larger size but felt it was too loose, and these shoes fit but there isnt a lot of wiggle room. Non le ricomprerei Worse yet the case wont close even with using the smallest Apple and Riyo tips.