That would probably be a cool bike. It all comes down to whether there are enough customers for it, which is information that we don't really have, unfortunately.
If it doesn't sell in significantly bigger numbers than the current XBs, it'll be deemed a failure from a business standpoint. Is it enough to grab a lot more customers? I can't say with any certainty but my guess would be probably not.
My assumption is that a good part of the Monster's appeal is derived from the Ducati logo on the tank--the halo effect from the vaunted Ducati superbikes and the feeling of Italian exotica. Buell doesn't have that kind of cache.
Buell's position is a bit tricky. They're not likely to grab too many of the squids, but it's getting to be time for a change. Right or wrong, from a perception standpoint, the motor is a big liability. And perception is...well, you know. So what do they do?
A new motor doesn't have to put them in direct competition with the supersports, especially assuming it's a twin, but you know the temptation will be there to compare them.
Like I said, tricky.