I appreciate the concern, but allow me to reiterate: the bike is primarily for my dad. He is the one who is looking for something more powerful, as he has over 20 years of riding experience under his belt on all kinds of bikes. That was back in the 80s and 90s though, which is why he would love to try out a newer SS. As for myself, like I said I've been riding dirt bikes since I was a kid including 450s which I think are reasonably powerful bikes, definitely more than the XT. You won't hear me complaining if I get occasional access to a supersport haha. I will not claim to be more mature and experienced than most riders here on the forum, but I will say I am not the type of rider to be 'ripping up the streets' all the time. My dad and I have both test ridden a number of bikes before the season ended last year, which included 300cc sport bikes like the ninja 300 and the 600cc supersports like the CBR600RR and R6. Obviously there is a large difference in power. To answer your question: no, there is nothing wrong with the 300s at all, in fact they're great bikes and if I was in the market for my own bike right now I would probably be looking at them because I wholeheartedly agree they are much more friendly to young riders (fuel efficiency, insurance, power, etc). But like I said, this is going to be my dad's bike and he's looking for a bike in the 600cc range, which both of us would feel comfortable on and have a blast riding.