Went trough a lot of noise gates (Hush mostly,even a 3630) i still prefer to use the far superior decimator pro G rack.It works very well and shuts down very quick.Another one i always loved and still use in my pedal board is the boss NS-2,too bad it never came out in a rack version.
It did, the Boss NS-50 was/is basically an NS-2 in half rack format. It's better though as it can track the input, bit like a decimator and has some better technology apparently. You don't need one now anyways.
I didn't like the decimator, well I did and I didn't, good for some stuff, but felt unnatural at times.
No matter what you have with noise, I'm a firm believer in, making everything else as quiet as possible before you even get your noise reduction happening. Shield your guitar, use good cable (van damme for example or anything that has low capacitance and a braid shield wire and conductive insulation).
No matter what is the best noise reducer out there, it is still gonna be shit if you have to have it up near max to get what your stuff quiet. None of them are going to eliminate noisey crappy rigs. Well just my thoughts anyway.