Depends on what you "need" as well as want. The mitts you posted are way more fashionable than the ones that are the warmest. For the money the Black Diamond Mercury Mitt is the way to go. For warmth, you are going to be hard pressed to beat the Hestra Army Leather Expedition Mitt.
I own and have used, the above plus the Hestra Army Leather Extreme Mitt and Reush Race Mitts..
The Mercury Mitts were a let down, but are reasonabled priced. Pretty good but the Hestras beat them "on MY hands". The Expedition Mitts have climbed Everest. Holy Crap are they warm.
I would qualify all of this as I DO NOT LIKE BEING COLD. I Like sports that happen during cold months, but I don't want to be cold.
Leather rules as the shell. Liners are better than not. A gloved liner in a mitten Liner with a mitten shell is wicked warm.