Moving to the new house we left behind our old worn out chairs. With the Black Friday sales I went to Office Depot and chose a basic steno type (no arms) for I think it was just under $100 US on sale.
I really recommend sitting in the actual model. I don't need much back support or adjustment but I am sensitive to the seat length and width. Some seats hit my thighs in a bad spot. I want at least an easy adjustable height control.
If you are a larger person be aware that chairs also have weight limits, although 250 lbs is somewhat standard some are much lower. I did a little looking but couldn't find the chair I bought -- don't remember but it had a name... one I saw that looked similar only had a 150 lb capacity.