LVR is authentic. While you don't pay VAT when you order from these companies, you end up paying an import tax, not to mention minor paperwork.
I ordered from Browns and ended up having to fax my Social security card over to DHL and then they paid the duties for me, to which I got turned around and billed for. It turned out to be about 9% tax (pretty hefty is you ask me), but the bag was cheaper than the states, but with the 9% it was about even. About the same as the states without the sales tax.
For future reference though, I am definitely going to think about adding 10% to whatever price I see online because of customs. I just didn't care for the whole thing with customs, it was a little bit of a hastle for me, but if you really want a bag badly, then it's a non-issue. I guess I didn't want it THAT badly. Still love the bag though.
For LVR, I've heard of people having the customs built into the cost of the bag. I'm not sure if that is true though. For Browns, you ended up getting a bill at the end after the price of the bag and all that via DHL.