Top of the line MacBook Pro (I just want the hardware to get out of the way)
An OS that also gets the heck out of the way (OSX has very annoying quirks, I'd prefer something like awm but that seamlessly supported the underlying platform)
A trackball (Logitech M570) - Have been using one for many years, can't stand a mouse anymore, though I wish companies would innovate trackballs as they do with mouses
At least one big monitor, ideally two (plus the laptop's screen)
A big adjustable desk with arm for the monitors (still on my wishlist)
Laptop stand
Good wireless keyboard (non-existent IMO, so I settle with Logitech's K750)
Multiport USB charger (didn't know I needed it until I got it, pretty neat to have)
Leet 200mbps fiber (could probably live with 20mbps, but can't go back once tasted hehe)