If you've got an OmniDawg cap and a Primus Omnifuel, stick with that combination. As much as I think MSR has done a super job with the new WLU, the Omnifuel is still the better stove, and with an OmniDawg it is as quiet or quieter than a Whisperlite. There are however drawbacks to the OmniDawg, not with the product itself (hardly!), but rather with cost and availability. OmniDawg's are made by hand by one individual in his non-commercial shop when he has time, and they can cost double the price of the stove or more. People who have seen one of the "Dawg" line of caps go nuts for the amazing craftsmanship, and they really reduce the volume of sound, but that (plus limited availability) drive the price up. I have an acquaintance who is a machinist, and his jaw dropped in amazement when I showed him a DragonTamer (the DragonTamer is to the MSR DragonFly what the OmniDawg is to the Primus Omnifuel).

HJ