I have a Futura 111 and 93 2009 models. I was lucky enough to get the reds ones.
With regards to fins I have only sailed these boards a couple of times each, but I have had luck in find out suitable fins. Here are my findings so far.
8.0m Cambered FreeRace 42cm Curtis Race
7.5m Cambered FreeRace 41cm Select RS7
7.0m Cambered FreeRace 39cm Select SL7
6.7m FreeRace 37cm Select SL7
6.2m FreeRace 35cm Select SL7 for flat water and 32cm Select Super Cross for more chop
5.7m FreeRace 30cm Select Super Cross
Please note the above is a guide and that you should switch to next size down fin if the winds picks up. Having multiple fins for your board is the best option for comfortable and fun sailing. Plus make sure you get a fin that suits the style of sailing and conditions you sail in.