Great setup mate! You went for the HS8's in the end then! very nice!
Been loving my HS7's for the last week mixing my bands album on them, the clarity on them compared the my previous speakers is night and day!
I've wanted an OP-1 since they were first announced. love the portability! This is the reason I use an iPad Pro mainly for writing as it means I can have a mini studio in my backpack!