Can I suggest that you sew with the chair that you already have and or any others to compare and to see what you like or don't like about it
@Diane.
Don't forget your sewing position will be different from what it was previously. In other words get used to your machine and your Horn cabinet before getting a new chair. I'd also suggest you try similar chairs, maybe you have an office supplies shop relatively close. I stuck with a boring looking chair for many a year because it was comfortable, the main thing!
The first one didn't look comfortable to me. I'd forget about storage in a chair, it's for sitting on!