re: What kind of office chair do you have?

Aereon will last twice if not three times as long as your 3-500 chair. So getting the aereon will save you money in the long run.

I've had mine for about 7 years and just as good the day it arrived.

Correction: I also have an eames chair in my home office and I would not recommend that chair for extended sitting. Aeron at the office