We found ourselves quite enamored with Samsung’s latest entry into the Chromebook line, mostly thanks to its incredibly low price of $250. Now Acer’s done gone even lower: $199 for its new C7 Chromebook. It’s an 11.6-inch (1,366 x 768) machine with a 320GB HDD and an Intel processor, rated for 3.5 hours of battery life — just about half that of Samsung’s ARM-powered entry. It still manages to be under an inch thick and packs a full-size Ethernet…