I had gotten a laube mini clipper years ago. I loved it as it was light weight, but it didn't last long and I never got it fixed. I use the Andis AG Super Two Speed - the ones that are burgundy colored. They have more of a square/rectangular shape to them instead of the round cylinder and I find it much easier to hold it in my hand. I have lots of problems with my hands, too. These work out real well for me.
A few years back, I tried a blue Andes that was rounder in shape, like the Oster. I used it once and couldnt' keep it in my hand, so I went back to my old standby.
I had started out with Oster, but I much prefer the Andis. The Andis are less maintenance than the oster, run quieter (which is a plus for puppies or skittish dogs) and just overall I have better control of the andis with my hands in the shape they are.
You might want to go to a Sally Beauty Supply or a dog show where you can see the clippers and hold them in your hand. But they are probably cheaper to order on line from dog vendors, than buying at Sally Beauty.
I have friends who swear by the Wahl clippers, but I've never held or used one.
I tried a cordless clipper, which was really nice, but they are heavier with the battery packs in them.
There might be something newer out there.
I normally get my blades and clippers from PetEdge.