Anet A8 is popular right now. Tevo Tarantula too, but has a bit more of a learning curve.

The Creality CR-10 if you catch the right sale is in that price range (Check "Press RESET" on YouTube for codes), it has an even larger build volume, good ratings, and goes together quickly. It has heated bed so can print PLA & ABS, but if you are doing a lot of ABS you will probably want to build an enclosure for it.