No real reason to get a new hop up (if your VFC has their rotary style hop unit). The best single thing you can do to improve your accuracy and range is to Flat-Hop or R-Hop it.
What type of battery are you using? Upping the voltage of your battery (i.e. 11.1v LiPo) is the easiest way to improve ROF and trigger response. If that doesn't have the desired effect then you're into changing your gears and or motor. If you are using an 11.1v LiPo it's a good idea to have a mosfet to prolong the life of your trigger contacts.