I think you could save some €30,- by picking a motherboard with H87 chipset instead of Z87, if you’re not getting the 4570K version it won’t overclock much anyway which is mainly what the Z87 is about as far as I know.
edit: just realised that if you’re getting it prebuilt from ADK you may not have an option to pick a different mobo.
It looks fine otherwise, should be a great machine.