Sound Level (high load): Two EU2000i vs. One EU3000iS

I live at 5000 ft and usually dont go below that very often. My 3000 has to be off of eco mode and everything turned off to start AC at this altitude. At sea level it starts it much easier so you should consider this when buying. I recently bought a EU6500 and its as quiet as the 3000, maybe even quieter and runs anything i need but i cant even dream about picking it up.