[petersanthony]

Stock tires:
All Passport trims come equipped with Continental CrossContact LX Sport tires. The difference is only in sizes:
Sport/EX-L come with 245/50-R20 102H
https://www.continentaltire.com/product/crosscontact-lx-sport-24550r20-102h/?
Touring/Elite come with 265/45-R20 108H (108H is unconfirmed at this point but I suspect it's true as it appears to be the cheapest option)
https://www.continentaltire.com/product/crosscontact-lx-sport-26545r20-108h-0/?

Based on TireRack ratings, the Continental CrossContact LX Sport in general are not that bad. They are rated good for dry and wet. They are, however, mediocre on the snow and treadwear is not that great.

I was looking for better performing all season tires with good performance on the snow while trying not to spend money on new rims. I also tried to find alternatives with minimum impact on speedometer.
So, here are what I see to be a good alternatives to stock tires based on these conditions:

Sport/EX-L
Michelin Defender LTX M/S in 255/50-R20 109H - great overall tire, highly praised, good wet and snow traction - this would be my choice.
Also would fit:
BFGoodrich Advantage T/A Sport LT in 245/50-R20 102H - good reviews but not many of them comparing to other
tires
Bridgestone Dueler H/L Alenza Plus in 255/50R20 109V - more expensive because of the higher speed rating (149 mph)

Touring/Elite
Michelin Defender LTX M/S in 265/50-R20 107T - great overall tire, highly praised, good wet and snow traction
Continental TerrainContact A/T in 265/50-R20 107T - a bit more off-road oriented with still good on-road performance
https://www.continentaltire.com/product/terraincontact-26550r20-107t/?

Both above options for Touring/Elite have slightly lower maximum speed (118 mph vs 130 mph for stock tires). But I do not see this being a problem for this vehicle. Both above would be my choice depending on priorities: the first one will likely would give a better gas mileage and the second would give a better off-road performance.
Also would fit:
BFGoodrich Advantage T/A Sport LT in 265/50-R20 111T
Bridgestone Dueler H/L Alenza Plus in 265/50R20 106V

In conclusion: all alternative tires listed above are heavier than stock tires, from about 4 lb (Michelin Defender LTX M/S) and up to 12 lb (Bridgestone Dueler H/L Alenza Plus) per tire.

A local dealer here is putting cooper discoverer AT3's in 265/50R20 on the stock wheels. Looks pretty good.

I am also conisedering the Yokohama Geolander AT G015 and the Kuhmo Crugen HT51 in that size. They are both three peak snowflake rated. I have personal experience with the Yoko's on a Rav4 and have been happy with both snow performance and treadwear. My son has the Kuhmo's on a mazda tribute and is very pleased with both treadwear and snow performance. He has been commuting over Snoqualmie pass every weekend all winter. I think the Kuhmo is the better of the two for high speed highway based on it's temp rating. I believe it is a 720 A A tire where the Yoko is a 600 A B tire but more aggressive for off/dirt road use.

My daughter has the Dean backcounty AT which is a sister tire to the cooper and it is not as good in the snow even though it also has the three peak snowflake. They are also very loud as they have worn so I would not recommend the Cooper AT3. It is not three peak snowflake rated but we had Cooper Discoverer SRX's on my wife's CX5 that we traded for the Passport and we were very happy with them. Did not have them long enought to comment on real life treadwear.