"Although I've never gotten a trike via the net, I can tell you our local dealer, Angletech, www.cycledifferent.com Has sold and shipped 100's of trikes from it's brick and mortor store here in Colorado Springs, CO. They carry several brands and have excellent customer service, JMHO. Angletech-Cycledifferent I've also heard good things about Utah Trikes, FYI"
I second bjjoondo's comment regarding Angletech and Utah Trikes. I bought a short wheelbase recumbent from Angletech in the store (the old one0 and then a recumbent tandem online. Very happy with both. And my Catrike Expedition was from Utah Trikes and came fully assembled, ready to ride. I plan on purchasing another trike from them in a couple of months.