I too own an FJR and Street Triple.
I'm 5'11" tall and 175lbs, the Street fit's just right. I did change the seat to a Sargent though, the stock one pushed me into the tank too much.
I've taken long weekend trips on the Street, Deals Gap/The Dragon, is about 4hrs away from me and a destination for me several times a year. I added a fly screen to smooth the air coming off the front a bit and it helps, but anything above 85mph is a bit uncomfortable for long distance. For a weekend romp, I have a tail tank bag that handle the logistics easily without upsetting the bikes performace or balance.
For around town and commuting, it's a fun and great bike. The 675 delivers a very refined power curve you can enjoy at all levels of riding. My problem is, I can't keep my fist out of it. Twisting that throttle makes me grin every time - it'll pull the front tire in the first three gears in stock form, and the handeling is superb. Unlike the Speed Triple, which I found a little raw and edgy, I find the little Street hard hitting when you want, or smooth and silky if you're feeling relaxed.
I average 45mpg regardless of of riding style, and the looks are definately a cut above the average bike on the road. I'll take a run to the local coffee shop, park it where I can enjoy the view while sipping my beverage and always get some kind of compliment or admiring question.
Owning an FJR for the heavy work and long distance riding strikes a great balance for me, and I like having options for my riding preference.
Here's mine.