So I had a look at the S8 and the + today, both very nice. One major difference is the curve of the screen, compared to the s7e it's almost unnoticeable. I was happily surprised by that. Even with video playback it looks a lot better through the curved sides than the s7e.
Size wise I'm happy with the + version after seeing it in person, feels very nice to hold and I'm pretty sure the fingerprint sensor will be ok once I've adjusted to it now that I've had a chance to physically try it. It's basically where the flash is on the s7e.
They had a black and a grey one, the grey is almost purple, very interesting colour but I'm happy with black.
The phones i saw had about 18gb used space already but they were in store demo mode with quite a few apps/videos/pictures.
If anyone wants to take a look I think they're in most carphone or currys stores.