Would you get a Desktop/Workstation AND a small Laptop or just a Laptop for everything ?
In the first case id go with a Mac Pro/Imac at work + a 11" Macbook Air for mobile use. However, i would still need a Windows Box for Gaming at home. That makes 3 Computers + iPhone and maybe iPad in the future.
Second option would be to go just with a Macbook Pro for everything. Problem here is that to make it a reasonable gamer for home use i would need a 15" which isnt really mobile. The 13" might just not be powerful enough for every task i throw at it.
I still like solution A more, having a powerful, always-on, Workstation that you can VNC into from anywhere is great. Also having a second small mobile computer around for dabbling is great aswell. I also hate plugging/unplugging everything all the time. But then theres the money argument. You need to setup some kind of data syncing which could be painful if you forget to sync and need your data on the road etc.
What do you use and why have you chosen todo so ?
I am a web / game developer by the way.