Haha, beat me to it.
That's pretty much what I use my setup for. The nice thing about detachable is that it gives some options - daily commuting I usually use just the top box (great for swapping my briefcase and lunch for helmet, gloves, and boots in the parking lot). Day trips I like just the panniers for camera gear, a change of clothes, extra drinks, tools, etc. And all three plus a tankbag like that pic is pretty much enough room for me to tour indefinitely (90% road including slab, 10% dirt and FSR).
I would recommend this setup for your needs.
2012 DL650 Shiro Nakama #27
Ride Report: http://www.stromtrooper.com/ride-reports-route-sheets/79121-footsteps-lewis-clark.html