In september I'll go to Ericeira in Portugal for 15 days. I was thinking about buying a surfboard, instead of renting one. I mean, it's like throwing money in the ocean if I rent more than 2 weeks. For that money I can buy a second hand board, or almost a new one.
I've been reading a lot of forum posts last couple of weeks to find out more about different surfboards and what kind of board would suit me.
About me:
Female
5'8" height
130 lbs
28 years old
go to the gym 2 times a week, guess my fitness level is average
I surfed a month ago in Holland, but that was just white water. To much currents and wind to get to the outside on a 7ft softtop.
I've been in Portugal 3 times before. Here I surf at beaches with reefs/sand covered rocks on 2ft. to 4 ft. high waves. I'm a little scared for higher waves

Last year I rented a 6.8 Surfseries funboard. It was 6'8" long 21" wide and 2 7/8" thick. I guess it's the same as NSP so it would be 45 liters.
For me it worked out well to paddle and to catch waves. I can make little turns, it's more like slowly steering than making fast turns.
My questions:
What is the difference between a Fish and a Funboard from brands like NSP and Torq?
Description for NSP Funboards (scroll a little down for their Fish boards) http://www.nspsurfboards.com/surfboards/#funboard
Description for Torq Funboards http://torqsurfboards.com/fun-68.html and for Torq Fish http://torqsurfboards.com/fish-66.html
I've heard from Torq users that you can make faster and sharper turns on a fish board and it will still have enough volume for the Dutch waves. But how are the fish boards in Portugues waves? And what differences will I feel between a fish and a funboard when I'm in the water trying to reach the outside through the white water, catch waves, stand up and turn?
Final question: what board would you recommend me?
Thanks!