For $300 you might be able to get a second hand, barebones Herman Miller with a lot of luck. I've been hunting down an Aeron for a little while to see what the best price I can get is. They retail for like $1,000 but I've never seen a more universally agreed upon "best" chair.
(I've only had one chance to sit in one myself, in an executive suite I was in for an interview. Definitely wanted to take it home with me, lol.)
Let the voice of love take you higher,
With this gathering power, go beyond even time!