Hi Joe. Welcome to the Zone!
You don't say what motors you are running, or what PSU.
I will assume 425 oz and 24V.
The 425s are not the BEST motor for G540, but will benefit from a higher Voltage PSU and because it has speed morphing and mid band resonance compensation, the G540 WILL improve your setup.
I would recommend the $60 48V PSU and $289 G540 from Keling:
Sell the Xylotex before it dies.