Here is a summary of what I've found from trying to answer the same question recently:
MSR XGK (EX): burns all liquid fuel well, lots of mountaineers use them, very popular in those areas and parts are more likely to be available. Afterburner and not very adjustable (although you can do the 3 pump low-pressure trick). Concerns about plastic pump breaking in the cold (bring an extra). Long history of use with success. Shaker jet to clear clogs (some people don't like this).
MSR Whisperlite International & Dragonfly: Burns all liquid fuels, but not designed to burn kerosene or unleaded and will have problems.
-Dragonfly is huge when opened and I have had trouble even fitting a windscreen around it, let alone keeping it close to the pot.
Primus Omnifuel: burns all liquid fuels well as well as canister. Not as popular, more of a European following. New model has two valves to adjust and less of a flamethrower. Metal pump, better in extreme cold. Long history of use with success. No shaker jet, but has cleaning needle.
Both of these stoves have a similar burner design, are sturdy, and very loud. Primus can use MSR liquid fuel containers, except the smallest one, 11oz, too short for the longer pump. Both are about $150-160. If you are an REI member, look for the 20% off member sale with the best return policy ever. Both stoves have devotees that will say they are better.
Other companies: haven't researched, sorry.
Another option: Bring one multifuel stove and 3 oz. canister stove as a backup in case it breaks.
Either way, bring an expedition repair kit for the stove. Practice disassembling the stoves and replacing every part and O-ring, changing the jets for unleaded/kerosene/canister, and cleaning everything. Practice with different fuels (kerosene needs to be primed, tricky the first time), in the snow/cold, and in the wind. Definitely need a windscreen, which are usually included with the stove.
For pots, Traildesigns (Caldera Cone) is selling the hard-anodized 2L pot. Bombproof, cheap, and lighter than titanium options at that size. Can use metal spoons since there is no non-stick coating, since I hear lexan spoons can break when it gets really cold. You may need that size or larger for snow-melting or boiling to treat (for larger, look at Open Country 1 gal). Both of those stoves should fit in a 2L pot to protect it while traveling.
-I'd recommend making a reflectix cozy to cover the pot (not higher than the lip), which makes eating out of pot much easier while keeping it warm. If you can, find a large rubber band or velcro and elastic attachment to keep the lid stuck on the pot & cozy while packing. Even if you put it in a stuff sack, the lid sometimes slides off and little things fall out.
– The best thing you can do to simplify things is figure out how to fit everything for cooking except fuel inside that pot to keep it all in the same place and protected. Stove, windscreen, bottom reflector (cut to fit inside flat on the bottom of the pot) repair kit, lighter, matches, spoon, soap, scrubber, priming alcohol, etc…
This is just what I get from perusing the web about choosing a stove for this type of trip. I wish I could actually go on it! Good luck.