I had an 08 wr250r, it was cool but not enough motor. They are dead reliable though. Out of the 3 listed I would go with the DRZ. Avoid the aprilia. If possible go bigger with a KTM or something.
http://www.mediabistro.com/tvspy/undercover-cameras-bust-chris-hansen-having-an-affair-with-wptv-reporter-kristyn-caddell_b13474
LOLz. I am too young to be this jaded, but nothing surprises me anymore in this world.