If you want flourishes then thats fine, but what the buck twins do is closer to juggling or perhaps magic masturbation.
I syble. It gets amazing responses from my audiences but that's about as advanced as I get. Simply because I don't NEED to do anything more.
Average Joe out there has no clue what a one handed cut looks like, they can't perform it, and are usually impressed with one in action.
The Buck Twins are GODS at their craft. You could devote 5 years of intense study to their craft and not even come close to duplicating their skill level. They are simply amazing. But they amaze us as magicians. For laymen, I think it's just too much of a good thing. It gets to a point where Joe Blow just gets saturated with the amazing dexterity.
If you want to flourish there are other probably less expensive works out there that won't frustrate you to all hell and back, and achieve the results you are looking for.
But with that being said, if you are the kind of person that wants to learn from some of the best in the business, then their DVDs are money well spent. As pointed out though: Their work isn't for beginners. Proceed with caution.
Kinda gotta feal this one out on your own I'm afraid.