Earlier quoted context omitted.
> I'd love to see Apple make a system that supported upgradeable memory, SSDs, High capacity hard drives, graphics, and separate larger monitors, but that doesn't look like that will ever happen. You may want to keep your eyes out for the new Mac Pro that's meant to release this year.
Even if the Mac Pro is the computer of all our dreams, I doubt it will meet the poster’s needs. Seems like they want a fairly bare-bones, minimalist and simple computer. I doubt a Mac Pro is going to come in at under $3.5k at the entry level.
My current development machine is a Mac Pro, the little cylinder from 2013, and I had a couple of the aluminum box ones and my first was in a plastic case. I just couldn't see upgrading to a current Mac Pro ($5k to $13k). It's thin and looks cool, but I thought that I would want to use a different (wider) monitor and didn't think the cooling offered by the case was a good idea. Maybe the new Mac Pro that is supposed to be offered later this year will be just right.