I've always wanted a Busa.
The funny thing is, when I was bike shopping I was looking to get the 1000. The dealership I went to had the blue k5 and the black/grey '05 Busa. The 1000 had just changed and I didn't like it too tuff, and to see the Busa a few bikes down just made my decision that much easier. That plus the fact that I don't wheelie and my knee may never scrape the ground, the Busa just seemed like a better bike for me.
Truth be told, I haven't had one regret.