I took what felt was the best, next step logical leap.
Any newer quad is fuel injected, cold starts are a non issue. If it does somehow get to cold to start, i probably dont want to be going anywhere anyway.
Someone mentioned a reliable quad with tracks. If there was ever one, this is it. Even though its belt drive, the primary clutch is driven by an internal old school oil bathed clutch, and doesn't turn endlessly or slip while trying to turn the secondary. The result, virtually no belt wear or failure. If your worried about it, bring a spare, just like you would on a snowmobile. If your climbing big hills or pushing deep powder, towing an ice shack or tugging trees home, use low range. I believe arctic cat uses the same drive system, dont quote me though.
Speed. It aint no speed demon. 50-60 km/h top out on hard pack. bigger engine quads go faster, ive seen some big can am's turning 100km/h plus on tracks. Ive no need, as im usually a putter, am in the woods somewhere or am hauling to much gear.
Unstoppable. Ive tried to get it stuck, on purpose. Came close once by driving into the backside of a soft drift. While i ceased forward movement, i just backed out. Be smart and youll never be stuck. That being said, bring a shovel, rope and pulleys for your winch incase you do.
Cost. Yeah, buy it once, cry once. Not cheap, but if you can get a used set they are more reasonable, pending you can make them work for your machines hubs.
Added benefit. If you snowplow with your quad, your atv will automatically become a mini bulldozer as a side effect. Making 15 foot snow ramps becomes fun, and the kids will thank you for it.
Added benefit. I can keep my shotty, chainsaw, ropes, pulleys, shovel, wrenches, spare saw parts, tools, blankets, extra clothing, lunch, water/other liquids, hunting or varmint rifle, extra footwear/clothing, extra fuel, extra person/seat, and still have a front and rear rack available for game, extra gear, etc. This is all before i attach a big boggon, and if i do, it doesnt effect the ability to go anywhere..