Hi SA 68,
you are absolutely right. The Isonic 101 will plan very early and will accelerate more than the Carve 111. You can carry a bigger sailsize than you have in your quiver. Aestimate a 8,0 to 8,4. The tail got wider a bit and that means it allows bigger fins (38 cm - 42 cm). The board is definitely a great choice. If you think about to get a 9,0, too I would decide for the iSonic 111, but for the 7,5 and the 6,5 the 101 is just perfect.
Just come back if you should have further questions.