It depends how much you could buy it back for. If it is damaged alot, you might be better off either buying it back and parting it out or fixing it. I would guess that it would be better for you to buy it back and fix it because of your modifications; the insurance company may not raise the value because of them, but the car is worth more because of them.
Edit: Your car looks (looked?) really nice, if you have pictures from before the damage (or after) i would like to see them.