stepher79

All of the chairs you posted have a rounded shape, which often means a hard surface to achieve that mold. What immediately came to mind, has a flat cushion but a rounded back with cushions on both surfaces and white leather. Calligaris: New York chair.
More like a car payment than a mortgage!!

Try a chair that has legs or base like theses, they have a nice spring that makes them very comfortable. The one pictured is a leather or vinyl but you can also find them in a molded plastic.
The vinyl cleans easily and even if it is plastic it will still be comfortable too

You seem to like mid century modern. crate & Barrel has a nice bentwood chair http://www.crateandbarrel.com/felix-white-side-chair/s501291 Felix. It comes in wood or white.