Dont get the 250 youll be ready to buy a new bike after a few weeks. They just dont have enuff power. The GSXR 600 would be a good bike for life if you dont plan on riding for hours at a time. The ZZR is a good rounded bike that would be good to learn on and keep but is Carb'ed. If you do go the GSXR route get an 03 or newer as theyre FI. As for me I pefer my 05' FZ6 but im a no plastic kinda guy. It all depends on what you like (sportbike, naked, standard, cruiser, supermoto, etc.)