I've just got back into biking after a 20 year break, I did a lot of reading and listening to good advice and bought a 600 Diversion, yes I know a lot of you will say it's a Grandads bike, but I am a Grandad But back to the point, I've now done a few hundred miles on my Divvy and I'm loving it, but as a born again biker the Divvy's power is awsome and it's had my heart rate sky high several times. For the time being I don't think I could handle anything with more power and I think the same applies to newly qualified riders. Gently does it I say.