I love design, architecture, architectural furniture, etc. Some of the high design stuff is horribly uncomfortable, and the comfy stuff is either not adjustable, as you point out, A.Wayne, or is truly fugly.
Christian, FWIW, I took a quick stroll through both the HMiller and Knoll websites. There is a Herman Miller executive chair that is padded and adjustable, but it is a tad ugly in my book. Perhaps in white leather, to make it look a little star trek, it would work, but it has a very old fashioned office chair look. If you can't find it, let me know and i'll send you the link. I think the Aero is much cleaner looking (as is the aluminum group chair but as mentioned, the arm rests are far from comfortable, i still have one at a desk in the home office, along with a vintage herman miller desk from the 50's.)
g997 : note that the 'back rest' on the lounge is low, so it really doesn't come up high enough to interfere with sonics, for me, at around 6' tall, the top of the chair is below shoulder height unless i really slouch down into it. I think the seat is too low for Christian though, given his height, as you said as well.