I've put almost 2000 miles on the Sabre since I got it the end of April. Between the Pro Pipe and the K&N air filter the performance improvement is definitely noticeable. I've done a couple of 300 mile rides on a combo of highway and twisties and as long as I ride with in the bike's limitations (on the twisties at least, yes I've scraped my heel a few times) I am one happy camper. I'm getting around 48-49 mpg (not great but not too shabby either).
I've led my son on his Triumph Street Triple on a few 120-200 mile rides and we've had great times.
For me at this time, this bike is a great fit. I'm glad I got it, met a group of Sabre owners on their forum and looking forward to some group rides. Life is alright right now.