I'm using a BRS-3000T. Light, small, cheap, and works. Have done mountain house, top ramien, knorr, bear creek, etc with it. The con is you'll need some sort of wind screen if it's windy or set up somewhere that's blocked. But for $17 you can't go wrong. I see there are now other similar ones made by FOHOZ and Lixada. All three of these stoves are in the $13-20 range. There are others too.
I was using a pocket rocket v1 before but it didn't fold up small enough to allow the gas and the stove to fit in the pot. These do and so does the v2 but the pocket rocket v2 is twice the price. But I will say the pocket rockets probably do a little better in a breeze.
The jetboil systems to me look heavy, large, and expensive. Pretty much the opposite of what I want for basically boiling water.