Guitar Builders: 65mm 1.5kW Spindle? Or 80mm 2.2kW?

Hello to any of you who are using your CNC to build guitars. I’d like to ask if any of you have tried using a 65mm Spindle? If so, are you still using it, or have you upgraded? I currently have a 65mm 1.5 kW Spindle on my machine and am wondering if I need to go ahead and upgrade to an 80mm 2.2kW or larger, or if the 1.5kW spindle will be strong enough?

Thanks for any input