Okay I'm really struggling.

I have recently ordered a custom board. I was chasing something a little different than what i currently ride. Both my Sweet potato and Evo are back foot boards and i really wanted something to cruise a little more on softer days. Heaps of paddle and something i can surf a bit more up forward.

So to Soul Long boards and Ross is making me a 6'8" board similar to a Takayama Scorpion. Single fin with side bites although after looking the board up online, i have changed to a 5 fin system..
I think as a quad on a good day will be heaps of fun also..

My question is though i have no idea on fins and options.

Im simply chasing ideas on what to start with..The board will have futures boxes and i think the main single set up should around 7 to 7.5 in size, but really don't even know were to start so please any ideas would be great..

Would something like this be a start
www.wetfins.com.au/surfboard-fins/longboard-fins/shapers-fins-7-clearwater-2-1-futures-blue/

Price is not really an issue..

Oh and maybe a good place to order also..

Thanks in advance.
It will be similar to this..