Which do you like best in your ears? Of course you want a nice sparkle coming off of the ear but I don't think you need that high of a clarity that's on the 1.6's. As long as the J color is not caring too much 'warmth' and no significant feathers, etc. in the diamonds, then they sound perfect. I have 4.15 twt and wear them everyday. I do have them set in a martini-style mtg. which means they sit low to my ear. This way I can sleep in them without bothering me.