Hey mate, I'd definately recommend sitting in a Bride Zeta before you buy one as I personally found them to be very tight around the shoulders. I'm about 6'4", and have large shoulders though.
I went through this saga a little while ago, and after going through 3 seats I settled on the Recaro SPA which was by far the most comfortable, lightest, and had the best proportions for my body (slim hipped, big shoulders). The SPA is very pricey though, but the SPG is about half the price and has very similar dimensions from memory, so I'd take a look at them.