Is it worth putting on? Does it decrease arrow speed, and will I be able to take off my string silencers, or would that be a bad idea.

Which one do I order, I have a Parker Ultra Lite 31 (not the extreme, so I think I have to get the front STS or w/e it's called where it goes in my stabilizer). But if that's the case, where do I put my stabalizer? Any input is appreciated, thanks.