I am struggling to decide which FC I should get for my next build. I have been using Betaflight, so the BFF3 is a natural upgrade. But I hear so much good things about Raceflight and it makes me want to try the Revolt V2. What are your opinions?

Betaflight F3 is very well established. Overwhelming amount of resources online. Tried and true workhorse and runs absolutely incredibly well. Huge amounts of developments and feature sets... I would stick with Betaflight until RF1 is a little bit more refined. You CAN get Betaflight to fly as good as RF1 out of the box but requires about some additional CLI commands, such as turning off notch filters etc..

Each firmware has a downside but they ALL also have a good side.