Having a big screen is so nice. The 17” MacBook Pro is the second best computer I ever had, after my current Thinkpad T530. If I had to buy a new computer today (hopefully not, as my Thinkpad is still going strong at five years old), I’d probably go for the P70.
I don’t mind having a big and heavy laptop though. I carry it in a backpack, and a few pounds more or less on my back is pretty insignificant.