I have a couple of friends who ride Jamis. They have their company headquarters in NJ if I'm not mistaken. My son has a Jamis hardtale too. They are decent quality bikes and the company seems to stand behind them. A couple of weeks ago, Jamis was running demo days up at Ringwood and had a whole fleet of bikes to try out.
But, I'm not sure I would recommend to the average person to buy a complete bike online, unless you can wrench it yourself.