I think I've decided to go with 45/37 double up front and a freewheel with a 32 or 34 large cog. The 52t chainring I have is bent and I'm not sure I'd be able to straighten it out, so going with a triple in the front would mean all new chainrings, and with the SLJ GT I've got I should be OK with the larger cogs in the back. From a purely aesthetic point, a triple with a smaller freewheel would be a bit more 'stealth', and since I have a longer spindle maybe I'll end up there at some point (and my 50+ year old knees may demand it....), but for now doing/buying less is 'more'!