I have a 2006 Copperhead Coupe with black stripes. I love the copperhead color so much it is rediculous.
I wanted a coupe, so I got the 2006 even though it had the stock black interior. I had access to a wrecked 2005 Copperhead edition, so I purchased the interior seats, steering wheel, shifter boot, and parking brake boot - all of which have the copperhead stitching and the seat backs that say Viper in copperhead stitching. These are all now in my 2006 Coupe. I also have the 2005 copperhead console with the copperhead sticker but I just kept it for posterity.
I have also had my underdash, inner door panels, and center console redone in copperhead leather (which took a while to locate!). The instrument cluster has been painted the copperhead color.
I have upgraded the radio to the RB1 with Sirius, and added a subwoofer to the back (which sounds 100x times better than the little sub between the car seats).
One thing left I plan to do is to install wheels with black centers. Maybe this summer.