May want to use less simple syrup when using curacao or other brandy based orange liqueurs. Or just know it may be a touch sweeter!
My favorite currently are the Ferrand Dry Curacao and Solerno Blood Orange liqueur which tastes very much like blood oranges to me. Both are a curacao style with a brandy base but are perhaps a bit less sweet than Gran Gala.
I must confess I have a bit of an orange liqueur "fetish" and I tend to have at least 6-8 different kinds at any one time.