A lot of personal preferences regarding this question...
I thought The Ski-Doo's were the most liked due to the windows... With that said, I booked marked these from a while back. Not sure if it was someone on this site or somewhere else. But many seemed to really like these.
https://coldguards.com/index.html
Personally, I have ridden with some cheap ones and they did the job... but I really don't like my arm sleeve getting caught on the edge of some of the designs. The Cold Guards Look like that would hold their shape very well. Before finding the Cold Guards I had already set my sled up with
PowerMadd 34500 Handguards. You can see I have them on all three of my sleds.
Here is the view from the seated position:
The kids and I all use FRX Fuel Gloves. I do have a pair of FRX Recon Heated gloves. I only get those out and night and when it gets really cold. I'd say on a 1-10 scale my setup is about a 6 for warmth... But it works for my comfort level... To be honest it's probably blocking too much cold air at times because the reason I will use the heated gloves at night is mine are getting sweet-soaked. Once that happens you just need dry gloves more than anything.
When my youngest was riding 2-up on my sled I bought the GEARS Heated Glove Liners Gen-X4. He had to turn them down most of the time. but the downside is the wires... The cord runs up your arms and out your jacket at the waist. They have a Y-shaped cord that is even long for me at 6'4". But they work.