Hi there, well you are pretty light - the 4'8" and 5'0 and bigger sizes all share very similar shape details, all closer to the very clean bottom shapes of the 2020/21 shape of the 95L. So no major concaves, clean, the volume very much placed in the standing area so you can float out much easier if the wind drops/they get going way earlier. the 4'6" and 4'7" are combo Prone foil/wingfoil pro type boards, with slightly different outlines and range of use. The 4'8 is more similar to what you are currently riding, unless you plan to do a lot of prone foiling or going out in super strong winds, I would take the 4'8" actually? Bit of volume is always nicer.