Go for Haworth Soji or get something cheaper?

I′m coming from some no name chair I got used for free. One of the arms broke off a few years ago.

Otherwise, I haven′t had any problems with it and find it fairly comfortable, but I′m wondering if spending >$500CAD on a Soji would be wasted on me and I′d be fine with something cheaper. I tempted to get it, but honestly I think anything must be better than what I have now.