It can be hard to find the perfect chair for sewing.
It's important to have one to support your back and one that doesn't put your legs to sleep.
I picked one up at Ikea and assembled it (which was easy to do). And after using it now for a few weeks I would say it a keeper.
It has a nice straight back, it can be raised and lowered, and it has wheels too!
If my memory serves me correctly, it was only about $25.