I had a Suzuki GS500F in England, over here its learner legal without being restricted. It was a great bike, very easy to ride, comfortable and never had a problem with it. I had it 2.5 years. Its not the most powerful learner legal but it will have no problem keeping up with the traffic. it looks like a sports bike but has more of an upright riding position which makes it more comfortable on longer rider.
I personally think some of the 600cc learner legal bikes are too powerful for a new rider.