My DF is my newest MSR stove with the addition of a Superfly and a regular vintage WL, I have around 20 MSR stoves in my stove collection, mostly older models. Maybe someone else will come along with a suggestion, I have a lot of old kerosene burners too. Some of the newer stoves that do good have roarer burners, but some will simmer, although silent burners would simmer better. On my lunch break, so short of suggestions other than many like the small, super light canister stoves that have come out. Check out the Omnifuel and some like that one. I know I read about someones Primus and it was too loud and they were selling it. If you use the Simmerlite, try low pressure in the fuel bottle if you are not aware of that technique to simmer. On a group trip last winter with a new bunch of folks I went with, they used all Simmerlites, I had my DF to melt snow. For the cooking/melting they did, the Simmerlites were fine.
Duane