Is depend of wich class you are Formula Experience or Formula windsurfing and the price you would like to put.
I do all the season with the FE 160 with the Overdrive 11mē with my 90 kgs and work verry well, but yes you will faster with the Code Red but not better planing, is almost the same at the same size.
The mast 520 doesn't existe anymore and it exactly the same as the 540 but go on the 10 and 11mē Overdrive.
Hope this can help
All the best