/ MSR micro rocket or jetboil zip?
zip, titanium, everytime.
you need only bivi once on a cramped ledge in the cold to see the benefits. rig it to hang and ditch the bits you dont need, even better.
micro rocket is still a great little stove, but leave it for using in lodges, summer trails and spacious camps.
More important I would say is the fuel.
You will notice a huge difference between 70/30 butane/propane and Jetboils own isobutane cannisters.
I would say get the micro rocket and some jetboil gas.
If you want to spend £25 extra on a Micro Rocket to save 30g, then go ahead but I think it'd be one of the least cost effective weight saving purchase you could make. Also, when I'm cooking for 2 (or 3) in the Alps I find using anything smaller than a 2litre pan is just a complete pain.
That said, either of the options you suggest would work well enough.
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