Hi all, would be grateful for a little piece of advice
Looking to buy a board and a rig, not sure what to choose. I have to say, variety is not always a good thing

I am 180cm tall, weigh 75 kilos. Have had two two-hour lessons on a 205L JP Funster in a very light wind. Thoroughly enjoyed it, did not struggle at all except not having much power at times. I think I am hooked on now. I am in the Devonport area, will be sailing when I have time, rather than when the weather is perfect.
Have done some research about boards, looks like I need a relatively large one with a centreboard. I might be wrong, but it looks like Starboard is the only one who offers boards with retractable centreboards and Clipperbox system, which closes the centreboard box flat and prevents water from entering through the bottom, so there is no drag at higher speeds. They offer Start, Rio and Go versions. My choice was between Rio M and Go Windsurfer, but the problem is I have never tried those boards. Haven't even seen them. I hope you can help me.
Another point is, I am going to keep this board, even if I grow out of it and buy another one for stronger winds.