my solution to this problem was to buy the type-s from japan (cheaper) and the hhkb carrying case...i am constantly on the move, and spend more time coding away from my desk on the train, a random cafe, etc...i had the same worry about switching, and as others have mentioned it's an easy switch between ISO and dr. wada madness
the only key i find i struggle with from time to time is the tilde (which makes for some funny random terminal madness)
I'd say if the only reason you're not getting it is worries about the layout, then buy it, the layout seems more weird then it really is...once i got mine i haven't been able to stop using it, and the laptop keyboard feels wrong