Which is the bike to buy?

If you want a bike to travel about town, in the range of 6 miles round trip or slightly more daily in small trips. The preference would be nothing under 18 speeds. On the light end weight wise if possible, and durable, something that will not fall apart. Full suspension desired but at least on the front. What bike would you choose for $150 or less, $150—$300, and above $300? What would be your maker of choice, if you had one, Cannondale, Specialized, Schwinn, Mongoose, Roadmaster, Bianchi, Magna, Huffy, Fuji, etc? Road bikes are not off the table but mountain or hybrid bikes are more favored.