I've been looking into the bike and most people are saying go R6, because the F4i is more of a touring bike with an upright seating position. It is also heavyer than most 600's? I will be using it on the street but would like an agressive seating position and agressive handling bike. and don't want to out grow the bike like most people with the high F4 turnover rate where there are lots for sale around here. They all sell the f4i for the R1 etc. Thanks.