Just my two cents: By the bike that fits you, your goals and your price range. Don't worry about where it's from. I know lots of people feel uncomfortable doing this, but you do not have to have it serviced at the same place you bought it from. While I do think it's great to have loyalty to a shop, I don't think that means you need to limit yourself to the bikes they sell. If a shop doesn't get that, then they arguably don't deserve my loyalty. They make more on service than the purchase of the bike anyway.
FWIW, I think Jamis makes some great bikes, especially for their price point. Plus, I like steel, especially when compared to lower end aluminum bikes.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher