kitekrazy1
A Macbook Pro might run that stuff. Your biggest resource hog will be QL. AS for running audio stuff I'd go the Mac side instead of PC. Once you turn on that turbo mode in a PC AMD or Intel processor, you will have to recharge the battery after two hours. A reason why MBP are far more expensive is they have much better battery.
I'm from the religion of "laptops are not for major audio". I'd look for a rack mount barebones instead and RYO. That's only from a budget perspective and you would be creating a portable PC.
I'm not a fan of laptops for high-performance scenarios.
With such tight internal space, performance compromises have to be made to keep heat in check.
CPU throttling, power-management, etc are a big obstacle when trying to achieve low/consistent DPC Latency.
To effectively play those soft-synths, the OP is going to want the ability to run substantial loads (glitch-free) at small ASIO buffer sizes (for tight timing).
For the same cost (or likely less), the OP could build a mini-ITX machine that would absolutely smoke any laptop (with none of the limitations) while still being small/portable.
FWIW, I built a mini-ITX machine using an Antec Skeleton case... and used that to play many gigs. Blew my MacBook Pro away! Could run virtually any combination of dense layers of Kontakt, Omnisphere, Ivory, etc... at a 48-sample ASIO buffer size (RME Babyface) for super tight timing.
BTW, If you install Windows on a MacBook Pro... and fully optimize it for maximum DAW performance, you'll blow thru the battery. :)