My favorite is the Neutral Posture 9700 (the 8000 series back with the headrest and deep contour seat). Though it's more conventional-looking than an Aeron, I

My favorite is the Neutral Posture 9700 (the 8000 series back with the headrest and deep contour seat). Though it's more conventional-looking than an Aeron, I think it's much more comfortable. It's very adjustable (including an inflatable lumbar pillow) and leans back far enough to nap in.