My 2 cents - ECS tuning has been great to me. I recently ordered 18" zhp style rims from them - I ordered 5 (1 was a scratch and dent - could hardly tell). They had a close out and I got all 5 shipped to my door for $490! The tires will cost more than the rims. I have also ordered multiple other items from ECS and they have always been easy to work with - ships right away and I have the items in 2 days.
I give this feedback to say - check their rims first and if you don't find something you like - go for the spacers (I know they have a sale on them right now).
Good luck - make sure you post some pics! I love the pics.