isonic or futura?

[NIKOS-GR]

hi every one i need to now if is worth to change my carve 162 2007 model for a futura 155 or a isonic150 to get early planing i am 1,92 and 94 kilos and my sails is a v8(8m) and a naish stealth 9.6.the wind range is 8-12 knots most times but a few times is up to 16 knots the waves are flat some time but most of it is chop.my skil is medium.what is the best for my??