I'm not sure about you deep vee guys but the Sportmaster lower combined with the XR in a 'cat application works very well in-fact. during testing comparing it with the Imco, the speed was the same and the handling ,with the long skeg on the merc was exceptional. We had some failures but they were in the top end. overall the drive works well. Now once again that is a cat application surfacing the drive over 100 mph.
I agree however, an intermediate drive (between the 6/xr would be a instant hit.
as for the bravo being faster. can't think that slow