+1 to what everybody just said.
Buffeting on these bikes tends to come from the windshield area and the lower front area.
For the windshield, the stock huge XCT windshield may do the trick, via a sort of brute force method, i.e., it's so large. But that assumes you like to look through a windshield, rather than over it (unless you're really freakin tall). I have an XCT, but I'm a look-over guy, so I used a Klockwerks Flare for the first season, and an 11" Madstad for the second and third season.
I know this may be a little late, but I don't think you need a windshield that large, i.e., the stock XCT shield. I've ridden other folks XCTs and demo bikes with that tall stocker, and found it too calm, almost stultifying.
The other advantage the XCT has is that it comes with the lower fairing storage pod thingies and the adjustable vents attached to them. That's the other source of buffeting, i.e., it starts down there, and comes on up. So, if you have a plain ol' XC, as Mags suggested, Goody makes nice painted metal deflectors; see that link. Alternatively, a lot of folks have been using JTD lowers with good results; see http://www.jtdcycleparts.com/Victory_c6.htm
So, you need the combination of a good air-deflecting windshield up top -- and there are an increasing number of vendors of these things -- and an air-deflector of some sort down by the crashbars or forks.