I have done A LOT of grooming in my lifetime, anywhere from congress/worlds level quarter horses, to arabians, to freisians, to dressage horses or jumpers, and therefore I have had/used a lot of kinds of clippers. One of my favorite clippers for problem horses are the Wahl Iron Horse clippers, they are SUPER quiet but still powerful, however one thing I dont like about these clippers are that the blades are adjustable rather than changeable. I also love the Oster A5 turbos, they have 2 clipping speeds and mine have lasted forever! These are great clippers if you get the right blades for them (the chronium? i think are ones to avoid). I also like andis, however I have never owned a pair, I just borrowed other peoples, also a very nice brand. One thing I do have to say though is it doesnt matter how nice or not your clippers are, if you dont take proper care of them and get the blades sharpened and keep the blades lubed they will fall apart. Hope this helped!