This might be of interest to any looking for a decent value, well-reviewed chair with a 10-year warranty:
www.ikea.com
MARKUS office chair, Vissle light grey - IKEA
MARKUS office chair, Vissle light grey. This ergonomic office chair keeps you comfy and focused with features like a manually adjustable tilt tension, and head-/armrests.
www.ikea.com