I would support your local shop. Many times you can get extra "deals" with your bike if you buy it at a local shop, upgrades on parts for cheap etc. I bought my bike at the local bike shop and have been back MANY times in the last few months to get services and small repairs and they have always just said no charge...with my old steed that wouldn't have been the case. So you definetly gain for yourself and you support your local biking community.
my 2¢
s.