Ok here you go with my two cents….
In my opinion the WRs are the bike to get, they are price the best, have an extra gear for more top end and already come set up with lights, radiator overflow and larger tank. I think Yamaha makes a bullet proof motor and trans!!!!!
CRFs from what I know have had a lot of valve issues, a lot of them are alos really good.
KXFs… well nobody really does them.
DRZSM is great but a little heavy, underpowered, and doesn't have that raw dirt bike with lights feel to it. But a great fun bike that you don't need to do anything unless you want more power. The motors are bullet proof!!!!
KTM to me is the cream of the crop with all the different styles and motor choices but KTM=Kost Too Much. So this is the one to buy if you want a great bike that comes with all the goodies and you have the money!!!!!
Hussaberg or Huskys, well there are not as many of them around and parts are difficult to come by and I have heard of a lot of overheating issues. I'm sure a great bike though.
Aprilla makes a great bike but even more expensive and they have had their share of motor problems, I think the 07s were the worst.
I had a WR426 and loved it!!!! Either get a rock hard but or do something with that seat and be prepared to fill up a lot if you decide to make any highway runs or you really have to sacrifice some bottom end for the top. But hey its a dirt bike and like you said you want something to ride around town. Can't go wrong with the DRZ SM, whip it around really easy, easy wheelies, and hey if you want to go jump it then go for it.