I've been "blessed" with a noisy motor, too. In addition to lifters, several people more knowledgeable than I have suggested the following possibilities when they heard my bike:
Sticky valves
Oil bleed down in the lifters. Should disappear after it warms up.
Piston slap. Mine develops at about 1800rpm and goes to 2200rpm, like yours, then disappears until 2900rpm, where it starts again. I've read on other sites that this is a common pattern of piston slap.
Lifters. I had my lifters replaced, and the noises are as bad as ever.
Wearing compensator.
Like you and many others, I've been told these are all "normal" noises. I'm not buying their excuses. I've heard calling customer service can light a fire under a dealer's azz, or even threaten with a lawsuit, but you need to try to get the dealers to take care of things before a lawsuit.
Good Luck, maybe we could get enough people together to file a class action lawsuit???
Dan