You're not even trying. Haste is covered in the OP of both specs you asked about, as well it is discussed in both of those thread. Search and read before posting. Yes MoC is deemed to be the best choice for SV hunters, it is also been discussed. I (and presumably no one else) knows what you mean by "does it snapshot".
Are there any haste plateaus for SV & BM?
I only found this post related to that topic.
Originally Posted by Azortharion
The only reasonable "known" plateau (which is not really worth going for), is at 3864 haste, which allows your Dire Beast to attack one more time per duration.
There are also SV hunter that use MoC, is it the best choice? does it snapshot?