Here's the thing, I have had my 640ADV for about 3 yrs & done almost 20,000kms wholly on the dirt in WA where the roads are long flat, fast & very Sandy. Also they are generally very dry due to the drought for the last 4 yrs. So here I am now in sunny Brissy where the roads are tight, slow & very hilly, not to mention very muddy & wet...(well the bits I've seen, so far) So is it worth keeping a long distance ADV bike which is wonderful when going fast but hates slow, mud & hills..& is pretty heavy.? like the rest of us I never have enough time to do the long rides, (2 kids, one on the way, need I say more)so is it worth hanging on to a bike that I can only really use once or twice a year..? My thoughts are the DRZ or the WR450, only a $1,000 diff in the price probs.. Any Thoughts ? Just wondering how many people have bikes in the shed that don't get ridden enough ? Other than me !!