Nothing wrong with old school. There aren't many, but I still occasionally see a younger rider on aluminum or steel kicking the crap out of someone else riding a $7000 carbon fiber bike. The rider is still, by far, the most important part of the equation. Don't feel bad riding old school, or dressing like it, either. Don't feel the need to spend $$$$$ just to "fit in". That said though, if you really feel like you want to go new and can afford it, go ahead. After all, we aren't all driving a 1979 Chrysler Cordoba, are we? A proper fit should help with the unstable feeling you had when test riding. You would get used to the twitchiness pretty quick I should think (cars all drive differently but we get used to them quickly). In the end, it's YOUR bike, not anyone else's.