Sorry for the delay. If you are going to get a smaller bike, get a dirt bike. Especially if you have placeds to ride it off road. It will teach you much more about riding than a street bike would. Plus if you fall off, it won't hurt as much

I started off on a 600, but I grew up around bikes. My grand parents still ride. I don't have one to show off, I have it to enjoy it. The 600 is more than enough power, but you have to respect it and know your limits. If you can curb yourself from doing stupid things, don't waste the money on a smaller bike.