I've just looked them up as I wasn't sure what Revo RV019 wheel design was like. I don't know anyone who has these but I think they look great; nice clean, simple design that should be really easy to clean. I think the matt bronze wheels and DBP paint of your GTI will work really well, and matt bronze should do a good job of hiding brake dust.
Will you be keeping your powder coated Santiagos to either use as winter wheels or put them back on the car when the time comes to sell it?
Be sure to put some pictures up when you've got the new wheels on the car!