Thanks mate - only problem is I'm off to Budapest the end of Feb. I'd happily walk around with just one lens all trip.
I used to use pretty exclusively a 35mm on my 5D - way back when. So I'm leaning towards that, 28mm (which would be my other choice) also will be pushing the limits of what I could get away with, namely portraits. That's not to say I wouldn't pick up a 28mm in time for travel.
The only thing is my current lens on the xpro is a 40mm. Will I really notice much difference between the 40 and 35.
Although I could sell the 40mm to fund a 28mm.