That is a huge difference in oil price so I can understand your temptation to go with the bulk dino oil.
If you haven't changed out the Fuchs yet, have you ever taken or kept track of the fuel economy on the 0W-20 oil? If not it might be worth doing and then compare to the dino oil.
I agree the dino will be "perfectly fine". Honda's are easy on motor oil, but if you can get the bulk oil in a 5W-30 grade that would be preferable. Although 5W-20 bulk is very common in NA I'm sure it's not available in OZ otherwise I'd recommend that.
I can tell you, the spectacular UOAs you have posted in the past with the Fuchs Titan GT-1 made quite an impression with many members here.