As far as I know, doing a dirt to street conversion is NOT legal in WA. If it does not have a street title when new, it will not be issued plates. That is why KTM, Gas Gas and Aprilia are selling dirt bikes with lights and turn signals.
I am 5 11 and the DR is as tall as I would want. I can get both toes on the ground at a stop- It will be lowered this winter when I get time to tear it apart.
Do not trust factory weight specs- the 372 lbs DR I quoted was measured with a full tank on my scales, guys in AVR weighed the KLR with full tanks at 427- shake them around at a dealer and you will get an accurate reflection of the difference. Of course at 6 lbs per gallon, the extra fuel of the KLR accounts for an 18 lb difference right there.
The motorcycle mags will give some info, the only one I trust to not sugarcoat is Motorcycle Consumer News, they take no ad money. The Oct 2007 issue has a comparison of the BMW x650, the Kawasaki KLR650, the Honda XR650, and the Suzuki DR650. Kawi came first, mostly because of features-fairing, skid plate, rack, and superior street comfort. Suzuki was second, sportiest, lowest seat height. If I were going to cross the country or ride to the Grand Canyon, the KLR would be first on the list.
April 2008 has a review of the Yamaha xt250, may 2008 has the Honda CRF230, and July 2008 the Kawasaki KLX250. These were mini tests of first impressions. The difference on the trails will be huge from the 650's- 100 lbs of weight !