Ok so I think I've found some scan lines, as it's my last day tomorrow before I can return the monitor within 7 days I've done some last minute testing and other than the wake up problem these faint lines are my only problem.
They only appear on the left hand side of the screen not on the right hand side for some reason and I have to be very close to pick them up, perhaps 30/40cm away from the screen, here are some pics, one is taken 20cm away the other 40cm away, as you can see from the second shot you can't seem them anymore. Upping the test to 60FPS they are nearly gone on the left hand side.
Is this problem likely to get worse? I cannot see them in game at all, maybe cause my TX pull over 60fps in everything I've tired.
You may need to change the size you view the pic to see the lines.....
So a little upset I pulled my old 4k out and loaded up a game, It felt like I was playing it on my phone - 28" felt like a massive come down in size, the colours of the TN panel looked shocking, I lost 20FPS straight away to the extra 4k res and I could feel the refresh rate drop as well which is something I didn't think I'd notice.
So all in all I think I'm keeping the X34, I've not noticed the scan lines at any other time or game, it's not like I spend 2 hours a day watching the Nvidia Gsync demo so all in all I'm not bothered.
Edit: Reset has fixed my "back light on in sleep mode" issue, now it takes about 5-10 seconds after windows has shut down the monitor for the backlight to turn off as well. So only one problem now.