Hello Vinnyboiler and welcome to SM! I'm a little skeptical of Photoshop's 3D capabilities but I guess I'll never know til I try it. I'd say you're off to a good start. But you never did describe your texturing problems. A couple things I noticed, the chair back looks really thin in that 3/4 view so that looks a bit strange. Also you could probably cut down the poly count on that and give the cushion a bit more resolution, see pic and those are just the edges that you can get rid of, I'm sure it can be streamlined more.

Added: The red marker for the edge in the middle of the chair back is meant to represent the entire edge loop running down the middle of the frame.