I decided to shop around for when the Hellcat comes home in the next 2 weeks and I'm glad I did. I have been with Nationwide for 7 years and they are great, never really considered switching. I have a clean driving record and no accidents and right now, I'm paying $1,200 every 6-mo for the 2 vehicles I own. Adding on the Hellcat was going to increase it to $1,800! I just spoke to Geico, gave them my VIN's, including the Hellcat, and they can get my rates down to less than $900 every 6 months! If I move to them, I'll reduce my overall annual insurance costs by $600 even adding on a new $65K, 707HP car.
I also checked with USAA and their rates with adding on the Hellcat were similar to Nationwide. Pays to shop around I guess.