So a couple of weeks in and I am very happy with the general performance. I have the Ram running at 2933 for daily use at tight timings which it seems happy with.
I have really struggled to get any extra speed out of the GPU - I think that might be down to thermals but I am not sure. Anything above 1300mhz just isn't stable for me - though I have launch day silicon also and I suspect that might be an issue.
I am running the system with a 1TB SSD and the whole thing is just super fast and responsive for everything I do daily.
Good to read. I'm interested to see what they'll do with these APU's in the future.