It sounds like you are wanting to buy an exhaust......but you lack a bike.
If I was going to buy a sportbike because of the way it sounded I would buy a V-twin ( ie. RC-51, TL-1000, SV 650, Ducati(s) etc etc etc). I don't think the inline 4's you listed would sound differently enough to merit buying one over the other.
Ubedee Ubudee That's all folks