Difficult question to Answer but most importantly I’d consider the type of riding you are doing. Which situations are you in that you feel your bike is falling short? Speed/Lightweight? Climbing? Technical downhill?
The more you ride – the more you want to ride – and if you are now gaining good experience it is probably a good time to think about where you want to go with the sport.
Another thing to look for: Some bike shops (I don’t believe performance does this) – will let you rent a demo bike for a day. You can try out a few different bikes this way and then if you buy from them, they will credit the rental fee back towards your purchase. This may be something else worth researching at shops in your neck of the woods…