I have the iSonic 125 and 94 (comparable to 122 and 96). For me this works well. The overlap is with the 7.7 that I sue on the 125 but also as biggest sail on the 94. I'm 92kg and sail the 94 with a 5.7 race sail as smallest. This works great, but think the board would be too big for a 5.0 race sail.
I didn't go for the iSonic 101 because I wanted a smaller faster (GPS) board that I could use also with my 7.7. The 86 was too small for that.
For the Canaries and the fact that you are a bit lighter I would go for the 86