Hi,
I am in the same situation as you, LeeVanCleef - I also want to replace my G73SW. I was thinking about buying a G751JY, because the performance of GTX 980m is very impressive. But I am still holding off for a few of reasons.
The most important one was G-SYNC - when I heard it's to be supported on notebook screens I knew that my next machine had to have it. Recently I also wanted to find out, whether it was to be supported in the non-G-SYNC-branded machines. (The branded ones are still not sold everywhere) But from what I read, the current situation looks pretty good. If ASUS doesn't make G-SYNC available officialy, G-tools from gamenab should make it work for every G751. (great person)
Also the 4 GB of VRAM in G751JY's GPU scares me off a bit, because I want my next notebook to be as futureproof as possible - in the light of several lazy PC ports: Watch Dogs, AC Unity, Batman Arkham Knight. All of these were ported from the current-gen consoles, both of which have 8 GB of unified memory, and the PC ports of these games usually only worked well enough for people with at least 6 GB of VRAM (also an SSD often helped to achieve optimal performance with ultra textures). Also a few PC ports, that are considered the good ones, have high VRAM requirements (4-6 GB) for their maximum settings. So I hope the G751JY's successor will have at least 6 GB of VRAM, ideally 8 GB.
Windows 10 out of the box would also be nice, because I'm not sure, whether ASUS is going to release new Windows 10 compatible versions of drivers/software for G751's.
ASUS should release their new flagship gaming notebook shortly after NVIDIA releases their next generation of mobile GPUs, I guess. I hope it happens before the end of 2015 and ASUS uses 8 GB version of GPU and also Windows 10.
I agree with you about audio ports rather being on the left side. And I also think they shouldn't use so much red color.