I have used just about every MSR stove made at one time or another. If I were to limit myself to one stove it would probly be the Whisper Lite. MSR customer service is second to none, IME.. I had a Firefly that I did not care for and I talked to a tech at MSR, he traded me straight across for a Whisper Lite. And sent me an updated pump. That said, while I do own a Whisper Lite, unless I am back packing I carry a Snow Peak Giga Power/pizo start and a fuel canister..
I also carry my Whisper Lite in a tin coffee pot, that I can use for heating water etc.