If i'm not mistaken the diamond will set you back about 950 with no third, not sure about the spidertrax.
I met the guy from diamond at king of the hammers last year, great guy. He was racing I was a crew member for him. Never met him before that but he knew a guy that I knew who was pit master for interco tires and the guy from diamond happen to be runnin intercos. He actually kicked me down a diamond for 250. He brought it with him for display purposes and hooked me up with it when he was leaving said he didn't want to bring it back home. I think he said he was from somewhere in the south