At that price point all bikes from the major brands that you will find at bike shops will be basically the same. You might step up a groupset level at that price between major and house brand bike you would order online. The trade off between major bike shop brands and online house brands will the personal service and peace of mind from dealing on someone face to face. If you don't know what size you really need or aren't able to tune and adjust everything on a bike that comes in a box I'd say a person is better off taking lower level components and having a shop help you through the process.