I'm almost with John on the "test ride and buy" recommendation. If there's an REI near you that has this (last) year's size XL in stock, try it and buy if you like it. But REI has been tinkering with the spec on the Randonnee for the last few years. For a couple years around 2009 they had a road gears with a 30-28 low gear, IIRC. For loaded touring, you want MTB gears, like a 26-34 low. I'd wait and see how this (next) year's bike is spec'ed before I pulled the trigger.
FWIW, OP, I'm your height and the XL has fit me pretty well. My 2006 frame broke in 2009, and REI treated me well; gave me a new bike, and then retrofitted the cassette, fenders, front rack, saddle, and the adjustable stem to get the bars up where I needed them. They even double-checked the wheel, and I ended up crossing the country with no broken spokes. Oh, and this frame has over 10,000 miles and is still going strong.
Also FWIW, close to half the other tourists we met had an LHT, and nobody had anything bad to say about them.