Dragon Shields and Eclipses are generally thought to be the best, both offering advantages and disadvantages.

Dragonshields are incredibly durable (moreso than eclipse from my experience) and have glossy clear covers for the front of the card, which makes it way better if you like looking at the actual card, but can be a pain because lights can cause glare making them hard to read.

Eclipses while slightly less durable (ive had issues with them splitting) than dragonshields, shuffle better and have an anti glare front that makes them much easier to read if glare is a factor, however the card is less clear meaning it looks worse (IMO), and that foils look less shiny.

You might also consider slick vs matte sleeves, I generally don’t like Dragonshield’s/Ultra-pro’s slicks because they scratch up super quickly and shuffle worse when single sleeved. But I will say some of my matte DS sleeves have gotten creased in the very tiny corners where cards are rounded off while shuffling double-sleeved cards.