re black derbies, I was tempted by these cordovan Dinkelackers. They are very heavy (and pricey) though. http://www.heinrich-dinkelacker.de/kollektion/master.html
Of the ones posted, i´d go for the Trickers.
^^ what are the shoes?
I want some slightly dressy, loose shorts, black linen.
And some sort of headwear/hat, but really unclear what
Otherwise im pretty set, black Old Town linen jacket, linen pants, black light weight derbies/birks.