Full coverage here! I also carry higher coverage then normal, with add-ons and Extra coverage for my aftermarket equipment and accessories. I have near everything of value that I've added to/on my vehicle insured and known by my Ins. Co., which increases my Tahoes value as far there concerned. That helps cause they consider prices of upgrades and what I have Extra insured when it comes to a claim. I pay extra for it all, but also know I'm not gonna get screwed if stolen, damaged, crashed, hit by uninsured/underinsured ect...
This really helped last year when we got slammed in front end. Over 7k in damage, but still got fixed. But would have been totalled if not for insuring aftermarket parts.
Most Insurance Co. will only fix up to a certain percentage amount of total value. 60%(for Geico I believe) and may be lower or higher depending on your Insurance company. They usually won't fix a vehicle if it costs almost as much as at would be to replace. Why it seems like they total out quick sometimes, even tho damage may not be that bad.