The Beta 75x is a great Brushless Whoop made by BetaFPV. Known for quality this is the right choice if you want to be on the save side regarding support and spare part supply. It might not be the cheapest option but you really get what you pay for.
This model comes with either two PH 2.0 connectors if you want to continue to use your 1S LiPo’s that you might have for your brushed whoop or a XT30 connector for proper 2S batteries. The XT30 option is the recommended one, since it allows to push higher currents than the PH 2.0 connectors.
It comes with a cam tilt of 35° which is a little bit steep for less experienced pilots or indoor flying, but perfect for tight outdoor spots. On thingiverse you can find cam mounts with different tilts. For indoors, 25° cam tilt is quite a good choice.