Based on what you are describing you are pretty safe with any of the name brands you come across in your target price range. Bikes are designed and spec'd to meet certain price points and with competitors specs in mind. As a result there is not a whole lot of differentiation between major brands at a given price point.

With that in mind I'd look at fit being the most important consideration. Brands may be spec'd similarly but differences can be found in fit and over all ride quality. Focus here.

The next thing to keep in mind is who you are buying from. Since you are going through an LBS I'd spend a moment considering the kind of after sales service you will get with your purchase and the relationship you have with the shop. This comes into play much more a few weeks or months after your initial purchase.

Good luck and enjoy shopping.