We run the 2 - Honda 2000's with a home made aux tank. Biggest reason, easy to carry and store in our trailer. I don't know the noise rating of them combined, but they are still one of the quietest on the market. I'd say they are just as quiet as a single.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.