Welcome to Extreme Astronomy, animalz!
As to telescopes getting bigger and bigger, I have to think that there's got to be some limit where it becomes not worthwhile due to diminishing returns due to atmospheric distortions and other earthbound factors. Ultimately, I'd think that space based scopes will rule the day with them becoming so common, sophisticated, and accessible that big ground based scopes will be only for amateurs. Of course that's probably a long way off yet, but,... I can dream can't I?
