Do You Need An Arrow Rest Thinking Of Switching From Aluminums To Carbons This Year. What Do You Think The Cost May Run?

Thinking of switching from aluminums to carbons this year. What do you think the cost may run? - do you need an arrow rest

I think I need to get a hair out of cookies, or at least a rest area below the arrows () at least a dozen, and perhaps a different version, but I wanted to know if you have to spend all the calls along the chain, if circumstances change. I've been using EA 2117 in the past.