I currently have a Macbook Pro 13.3 inch - 512 gb and Im ready to upgrade today

My current 2.4 GHz Quad-Core Intel Core i5 processor, graphics - Intel Iris Plus Graphics 655 1536 MB, Memory - 8 GB 2133 MHz LPDDR3

I dont understnd the new M3, M3pro and MP3 Max proccesors.

The only huge software i have is final cut pro and i usually save my libraries on an extended hard drive.

Please what apple laptop would you recommend.