dual purpose bike wanted

ok all....it has been a long time since i have had a dirt bike and i miss it but i would like to play a little but mainly it would be a daily driver back and forth to work.what is a good choice for a little dirt riding and best for street manners? i am looking for used big bore prefer about a 600 or so...at one time i know the Honda XL was a good choice for a more aggressive dirt ride than street, and kawasaki had the best for street manners.

It's a pricier option, but the BMW F650GS (ours happend to be the black/white Dakar edition) has some nice road manners. I never took it out in the dirt, so I can't give you any input there. I kinda got out of dirt riding when I made a major f-up as a kid, so I stick to the streets now. Good luck!