well welcome to the site, its a great place to ask and get Good answers
good group of guys here
as for hunting deer next yr??? why wait till then?
if your shooting well now, no better time to start than now
you really don't need a ton of great to hunt and kill deer
sure its nice to have the latest and greatest and all the hype stuff, but its truely not needed
as for your rest, its personal preference for sure, I know many guys that have hunted with a wisker rest and still love them as they did the day they got them,
sure it could take a feather or two off after a LOT of shooting, and will drop a few FPS, I don't think its as high as 10-15, but could be wrong,,
but it really doesn't make a huge difference, biggest importance is how well you group and can place at arrow where you want it at what ever range your comfortable shooting and NOT bashing the advice about a drop away, they do work and are nice once set up right, but a wisker rest to me is a simpler rest and less to go wrong so two sides to every coin

best of luck and have fun!