i have 3 of the girbaltars on my kit, one holding a 10" splash, one holding a 12" china and the other holding a 14" crash. at one point i had one holding a 16" crash and ive even put an 18" china on it, fully extended horizontally and it held (as did the roadpro stand) like a rock. ill never have a problem reccomending the gibraltar grabber arm...theyre much cheaper than stands, they take up less room, and they get into tighter spaces no matter what you need them to hold.
ive used the Pearls on my set. they dont hold anything big but i dont have any problems with them. ive got 2 of them, one holds a 10" splash and the other holds a cowbell. they are pretty solid and dont move at all. Pearl makes strong hardware but so does Gibraltar, ive used cymbals stands and pedals from them. so its a good product either way