I've never regarded laptops as a personally customisable computer. Buy one at the spec you want and use it. That's it.
If you want to start swapping parts out, go buy a Mac Pro. The smaller and lighter and better the design the MBP will continue to push will mean obviously mean they'll tighten up in other areas.
If you want to start swapping parts out, go buy a Mac Pro. The smaller and lighter and better the design the MBP will continue to push will mean obviously mean they'll tighten up in other areas.