after seeing your video's last year I went out to grattan to watch and it was awesome. I gotta get my car out there hopefully this year.
as for the coil overs I have been looking at them too and the cheapest place I found is
www.autofabracecars.com there not a sponsor here but they do have the cheapest price I found. for my car they are 409 and summit's price is 449.
hope this helps.