I agree that it is good to support the LBS. I also agree that it is a good idea to buy good tires, but some of Paul's comments don't ring true to me.
First I didn't notice anyone in this thread saying to buy online, so those comments were strange.
Next, the comment about tires being damaged in shipping. I have never heard of that happening and besides, tires are shipped to the LBS too and then in many shops hung out where everybody who comes in the store can handle them. I am not worried that tires are likely to be damaged from either source, but if I were I doubt that it is more likely to be the case with online orders.
Regarding shipping, yes you have to consider shipping, but online prices are often still cheaper even with the shipping costs, especially since you are likely to not pay sales tax.
Paul you don't say why you think wire beads aren't worth it. Care to explain?
Note that I am not particularly advocating for buying online, I just thought some of the reasons listed were pretty lame.
Buy from the LBS because you want to support them, or buy from them because it is convenient, or buy from them because they offer a better deal.
Personally I sometimes buy online and sometimes buy locally. I decide which way to go on a purchase by purchase basis and go with the one that seems like the best deal. If it is close I lean toward the LBS.