I found the OP by mistake, I have now joined, so that I can add my phots of all the 8458 models and the 2 requiring parts from the 8466.
Sorry it's quite pic heavy.
I hope I'm not being out of order with my second post by doing this. If I have I'm sorry.
A. Silver Champion.
B. Racing Truck
C. Street Sensation (Lego's Official 3rd model, easy build but not particularly pleasing wise to look at)
D. Nathanael Kuipers' Silver Sports Car (Good instructions, good build, looks good)
E. Nathanael Kuipers' GT car (Requires parts from 8466, poor instructions made the build heavy going, cracking model when finished)
F Nathanael Kuipers' Supercar (Requires parts from 8466, good building experience, plenty of features, definitely the best one)