I have an MSI Dominator. Nvidia gtx 870. Quad i7 2.8 cpu . Monitor 17 inches. RAM 32 gb. SSd 512 gb.
Regarding portability, is pretty bad, because is really huge for a laptop. The battery is heavy.
Nevertheless I am pretty happy with this machine, because I do not need to move it constantly, just from time to time. It is powerful, considering that is a laptop.
I use it for modelling and render. I guess that my next machine will be MSI again, due to the relationship price-quality, pretty good. I have seen in Amazon some MSI desktop that are really interesting. My previous workstation was a Dell T7500 (2009), dual Xeon motherboard, nvidia quadro, etc. Despite its age, it still being 25% as fast as the MSI i7 for rendering. But Dell workstations are too much expensive for me now, so I can not upgrade to the current version of Dell workstation.