You should get in touch with zedx11 (aka Darrell), he is selling his ZX-10R in order to get a 14
Just kidding man, inside joke, DO NOT get a litre bike as your first ride!!!
If you don't mind starting small, get a 250. You can find used ones that they'll basically throw at you.
If you're worried about growing out if it too soon, get an EX500.
If you're on the crazy side, go for a used supersport 600 bike, but personally I do not recommend these as a first bike. This is from someone who got a 636 as their first bike
