Little bikes for the track, big bikes for the street.
The market has evolved away from small fast bikes. Now if it's under 600c in pretty well all cases it's a neutered learner bike.
30 years ago there were fast 400s and 250s, and there still are in some parts of the world. In North America thanks in no small part to the USA USA mentality those small fast bikes are extinct.
My trip through motorcycle ownership has been peaks and valleys of size and performance. From a sportbike to a tourer to a dualsport to another sport bike and always in the past with plenty to choose from. And I"m sure many others have experienced this same route.
Now the trip is a straight road up the mountain with the only choices being bigger and bigger. Kind of a shame.
Maybe those new KTMs will shake it up.
The KTM 390 has 44 hp so it's a step up from the 250 which has 28 hp, has ABS just preload for adjustment on suspension, light nimble one of the riders on Monday Ride has one 5'4'' and it fits well. Not cheap about 7400 out the door.
A couple of threads over at advrider.com could provide some useful info/insights into the RC, and downsizing:
incase the OP still wants to go all out and get that dream bike of his: