RE: My first Starboard: question
I have used the RRD once and have also owned a Go 155 and carve 161, and am 80 kg's. I beg to differ with boussog1 :-).
The Go is not a beginner board. The 155 is a very good board for any level and frankly has it all over the easyrider, which I did not rate at all. The carve 161(162) is also a very nice board
My view is that to "learn very good planing, straps, speed jibes" the Go will give you what you are looking for.
The combination of wider tail, more weight, multiple footstrap positions and EVA will make every step along the learning cure easier and more comfortable. It will plane earlier and go into higher winds than the carve.
I see the large carve as a board for more advanced windsurfers looking for a good ride in light winds without going the formula/isonic route.