Well, do you have cable or satellite? You can catch it that way. Or Google a source for the subs so you can catch up to the English dub, since XY probably won't hit rerun status until December or later on Cartoon Network.
Most people don't have time to watch 800 episodes, haha. I only did it myself by multitasking most arcs as well as catching the episodes as they were uploaded to the official Pokemon.com TV site (I watched Kanto, Johto, Hoenn, and Sinnoh all be uploaded, and then Unova about a year after it debuted through this way).
I found fifth gen okay, but I found it a letdown from 4th gen, which felt like it went to greater lengths to expand on character development. The Rockets being competent was refreshing, though.
I don't really have a favorite gen of the anime, myself. Though the Meloetta arc was fun for me. Bet you can't guess why. :P