You might consider the Racor
500 series as well. Greater initial cost, but the replacement filters are about 1/2 the cost of the 120's and are readily available all over the world. Also, you don't need to bleed the system after replacing elements. I use them with the 2 micron filter element on my Nanni 3.30's, which helps make the secondary filters last longer. The replacement elements on the Racor 500 run about $11, whereas the secondary filters are around $30 and much more difficult to find.
I checked out your link, beautiful boat and build!