Hay , that's a nice looking bag !
I'll tell ya what I've done :
I ordered the Seat w/Back-rest from RE
I ordered the Touring windshield from RE
I ordered the Givi Mono key side cases frames made for this bike
I've already got two extra sets of Segway side bags. (caught them on sale and shipping was the same for three pairs as for one pair.) One pair is on the 350 Meteor.
When I had the Guzzi :
It was top heavy to begin with and it was light (412#). So with weight in the TOP BOX and Marcia on too it was really top-heavy !
How much you ask ? Well , enough to want to topple over if it got even a little bit off center. I had lots of close calls on it.
With no luggage and ridding solo it was GREAT !

So
This time I decided to keep the weight down low as possible , but like the ride to Texas in April , I'll want to bring a tent/sleeping bag/bed-mat/camping chair ...