Most personal replies to the Xr600R, don't bear experience in touring. My XR has spent three years on the US enduro circuit, and last year 3 months travelling through south America to Terra del Fuego.
As a bike the engine proved flawless, with a few exceptions. "pinking" due to the high power ratio was common with all fuel types in latin Ameria, the only solution was to hang back on the throttle and change jets frequently at different altitudes.
The bike is really designed for enduro riding. The stock seat, is a 20 minute seat, problem solved by purchasing a Corbin seat. Be warned the Corbin seat fits poorly and apart from the leather was a terrible manufacture (4 of us travelled and the problem was common on all bikes). Luggage is the next problem, the soft bags fitted really had no where to attach, and a frame had to be built to prevent them swinging onto the back wheel.. The caught fire twice from the exhaust! so make your heat resistance material bomb proof.
Desert Michelins where fantastic tyres, lasting about 7000 miles. The local tyres lasted about 1500 miles.
in 10,000 miles we each went through 3 chains, and 6 chain sliders! It's very difficult trying to purchase these in south america so take them with you. the weight on the suspension, causes this extreme wear, stretching the chain massively.
In hind sight, one of our party rode the XR 650 L, by far the most comfortable, better geared and best prepared for the trip. This would have been the bike to travel on leaving the XR600R, to do what it best at, trail and enduro riding.