Did you mean to attach a picture?

These chairs are easy to recover and the range of fabric available today gives you plenty of choice. I say go for it. If you don't feel up to it yourself get an upholsterer, but plenty of YouTube tutorials about.

Once you go white (which I think is a great idea) you might find that the existing handles look good. If you want to change them I would suggest handles that are consistent with the period of the house/kitchen. And, I would keep them simple based on the design of the cabinetry. :-)

I have just bought a schweigen with motor on the roof. The best information and help that I got was from the installers. Parex Industries are the NZ importers, but I must say the only help they gave me was the phone number of the installers. I just tried to find it for you but can't. They are brilliant to talk to and get advise from. I spoke to them before I purchased. The one thing that I realized is the installation is one of the major factors. Give Parex a ring and get installers number will be your best bet, all the retail outlets did was provide conflicting information.