I have used Whisperlite Internationals for about 15 years, and on 3 VERY long Australian tours used the SVEA 123 packaged in the SIGG tourist cook set. I bought the Sigg unit used on ebay a number of years ago. Worked great with white gas. The issue in Australia (where I did my touring) is that naptha/white gas is difficult to find sometimes. The WL International can burn car fuel and diesel, so that gives it incredible flexibility.....

I also own a dragonfly which I bought used because it is easily adjustable down to simmer - BUT since I have not used it yet (nor even lit it) I will make no comment about it...