Same, I have done a lot of work on my laptop but there is a limit when compared to pc. You just have to focus on the parts that matter most i.e. best video card/processor. Your build is nearly enough to send someone to the moon.
Not the case anymore with Alienwares new Area51 17" laptops.... both the video card and processor are future proof upgradeable. The only limit is the power supply... though it's not SUPER portable lol