I'm going to suggest you also take a look at the Yamaha TW200 and XT250. They are capable commuters but also loads of fun. I know you want something to cruise down the highways on - if higher than speed-limit speeds are vital then I would also consider the V-strom- which leaves the thumper category.
I'm 6ft and own a TW200, I do also own a big heavy 1200cc street bike for speed but I get the most comfort and fun out of the little Yamaha.
Shop around and have fun. Good Luck!