Support the good retailers on the net.
I shop hard for the best price, mostly on-line. But I have my favortie on-line retailers because of service, reliability or price. (Two of them advertise here). If you find a lower price your favorite on-line retailer will sometimes have a price matching policy.
However, just like an LBS, price is not everything, ease of transaction and ability to easily communiucate with a real person means alot to me
I did not reasearch your prices but in general they look good.
I bought the previous version of the pump for the same price (at my LBS).