The Yamaha wr250 is a good powerful 250 DS, not too much top end but good grunt. I have a KLX 250s, while a little underpowered without a few mods, it is nice and tall! I am 6′ 0″ and could only flat foot it after breaking in the shocks a bit on the trails. I think the WR is only slightly shorter. I know they make the KLX250 (KLX250sf) in motard fashion, but not the WR 250
For around the city, I would totally get a DRZ motard. Throw a tail rack on it and you got a fun and nimble commuter/learner.