Careful with benchmarks. They can be tricky if you're basing your presumtions on milliseconds.
You'll also wish to consider heat dissipation, how hot the chip in question runs, but also. graphics processor if you plan on dipping into Vantage or other similar gpu/xpu real time renderer.
I can't speak for anyone else, but I have very poor results with cpu heat, during real time rendering ineractive renderers), unless I'm on a workstation running water loops. (My preference not to be in the 80-90c range).
I personally cringe at the thought of running high specs on a laptop, but then, many do, so I'm certain you'll work it our.
Please make sure whatever you purchase, handles heat very well.
B