One thing to bear in mind if you need raw power is the CPU is still going to be lacking in a notebook. The notebook class 6700HQ is clocked at a maximum of 3.5G

One thing to bear in mind if you need raw power is the CPU is still going to be lacking in a notebook. The notebook class 6700HQ is clocked at a maximum of 3.5GHz vs 4.2GHz for the desktop class 6700K (and much more if you overclock it), and it's probably not going to run at that speed for long due to thermal limiting. I was considering getting the new MBP, but instead bought a used workstation. It has a Xeon E5-2670 (8 core/16 thread) and 32GB RAM, I stuck in an RX480 and now have a pretty good working and gaming machine for ~€800. Some games are still poorly optimised for multiple cores though (e.g. Arma 3), so single core performance is still the king for gaming.