I think parts availability will be a big factor for a lot of things.  I've driven both the turbo and the n/a 7M before, and the 1G doesn't feel too much slower, if at all.  I don't street race, so I am not going to notice the 20 HP difference.  I've also read a couple dyno charts where a stock 1G puts around 218 HP to the wheels.  Considering Toyota rates the 1G-GTEU at 210 at the crank, I won't complain.  I've read they peak around 280 at the wheels with decent parts and money, but for that money I can buy a 1JZ and modify it.  
Also, as far as I can find, only the Brits and Aussies got the 1G outside of Japan.  It's a good thing I'm not putting the car on the road until May; I don't even know what kind of oil filter I need yet.  But hey, learning new things is fun right?