If your the kind of guy that "stunts" on public streets with other people around then my statement stands. If you only do it off of public streets then its all good, I commend your skill. I just don't like people that ride like idiots on public streets and give bikers a bad name is all.
And definately do the riding around with your dad gig. Here for your permit your supposed to ride with a licensed rider at all times anyhow. Your dad can give you pointers and watch out for you while you learn. If you have practiced some on your dads bike I say get the R6 and just don't let your balls grow faster than your skill level //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
...edit, you said it will be a while. Get on your dads bike as much as you can before you buy yours and you'll be ready.