Acer's C720 is good, save for the keyboard. It's total crap (as in I've got key caps worn off--not labels, but the scissor stabilizers that hold the cap on--and that started after less than two months of use). Not a problem if not typing much.
Acer's C710 can be found used/refurb cheap quite often, and is a very good value (often <$150 w/ SSD). A bit less battery life, you won't notice the slightly worse performance, and its RAM and SSD/HDD can be upgraded. Also, it has a decent keyboard.
Most of the ARM ones are like a typical phone or tablet, performance-wise. Not acceptable, IMO, when the Haswell based ones are available. Even the new Atoms and Jaguars are better, if barely. Samsung's ARM one (I forget the model, ATM) comes with a 1080P display and gets fantastic battery life, though.
HP and Dell both definitely offer a bit better quality, overall, and you pay some for it. I'd get Dell's, if the main goal is to not fuss with Windows, mroe-so than just getting a cheap notebook. Lenovo's is OK, but with the SB and Haswell CPUs in other Chromebooks, it just doesn't make much sense, for a personal purchase (they use crippled Jaguars, but it's ruggedized, so sells to schools about as fast as they can make them, it seems).