Do not go for a chair just because it looks stylish. I have seen many many people fall in that trap and buy something that turned out to be eventually super clumsy. Looks matter for 0 in this regard.
You may eventually buy a chair that undercuts your cost by lets say half or even more, but it has the potential to really screw with your back. You do not want that to happen because the ramifications are even worse in the medium to longer term. One can end with a shooting lower back ache and stuff.
If everything fails, go for a humble Nilkamal plastic chair. I had that for a very long time. It is well designed keeping in view all the ergonomics and won't cost you the Earth and the Heaven!