I say dive into the deep-end and buy the Bonnie Black or T100. Both are only 1.5" longer in length and wheel base than the Honda Rebel. The Triumphs sit a little higher by 4". The biggest difference is weight by about 140lbs and of course power. Keep the throttle back until your comfortable and you'll be all right. The beginners MSF course is a must. Most provide bikes like the Rebel and successfully finishing the course in most states takes the place of the operational exam. You'll do fine.
Regards,
Tom
