Another vote for Double K Clippers - AWESOME and well worth the investment!

Look into Oster clippers for livestock, horse clippers are kinda wimpy IMHO.  Livestock shears can make quick work of all that hair.  Some of the livestock shows around here have places that do repair/sharpening and they also sell used models.

I've killed just about every clipper I've ever owned except for all my Osters.

I too prefer the Double K clippers. They last forever! I bodyclip a couple of mules several times a year with mine and have never had them let me down.  They are so powerful, you don't even have to wash the animal first but it is recomended to prevent dulling of the blades. They take A5 blades. My current set has been with me since Dec 99. They replaced a 14 yr old set that was stolen from me when our barn tackroom was robbed. You can buy them at Schneiders.

www.sstack.com

For small cordless clippers, I use the Arco. I still have my big sumbeams and my A5, but I rarely use them.

Terri, I use the Oster Golden A5 2 speed clipper.

Body part, clipper blade size, etc:

legs, 10 or 15, I clip the whites a week or so early so they look crisp with French white

ears, 40 or 50, clip every last hair inside and around edges

muzzle, razor blade, but 40 or 50 on inside of nostril for the fuzzy hair

eyes, 40 or 50, eye wiskers only don't cut the lashes!

rest of head and throat latch, can be anything from a 15 to 40 depending on animals hair and show type

bridle path, 40 or 50, lay the ear down at the longest point the ear touches the bridle path is the length is should be cut for stock horses and I start a little behind the pole to give more forelock hair...Arabs cut their BP's longer to accentuate the swan like necks

belly guard hair, any blade with the proper guard you only want to cut guard hair not body hair

Terri, I hope this helps clipping is an art much like any other hair design.  A great clip job can take a pasture pony to the winners circle and a bad one can keep you out of it!