Swiftech is about to release their new AIO called the H220X. I've done some digging on it, and it seems more like a starter kit than an AIO. From what I know so far, I can tell you that it'll be prefilled, but the components are G1/4 inch compatible, so you can easily expand the loop with the same components. The pump is mounted on the radiator along with the reservoir, it's a detuned version of the upcoming Swiftech MCP50X, and it should be more than strong enough for future expansion. The 240mm version of this kit will be $149, with bigger rads coming later this year. I think this is a very good place to start if you don't want to spend a lot of money.
Totally forgot about this, this is am excellent choice as well.