I understand; you have to do what you're most comfortable with. I'm with State Farm as well, and I, too, thought they'd jack up my rates recently when my '05 FX35 was totalled on April 2nd (w/injuries of which I'm still in physical therapy trying to avoid surgery for a torn meniscus and TCL), when I'd just had a claim two weeks prior upon hitting a large pothole that tore off the gravel shield, cracked the oil pan, ruined the oil seals, etc., - so yeah, I feel your pain.
I was amazed to learn from my State Farm agent the pothole incident was considered "no fault" and didn't imipact my premium. The company doesn't go in arrears to "catcha" either, so I think you're in the clear (especially if you've been a longtime, loyal customer - in my case, since 1999), but it's your decision. Do whatever you're most comfortable with.
I don't feel the quarter panel needs replacing; it can be repaired, adjusted and repainted. But, keep in mind, if you have all-around sensors, one or more could have been damaged as well. Lots of times, all damage can't been seen on these newer vehciles from an inexperienced, naked eye - especially with the fancy electronics of late. The impact alone could've damaged the senors, you wouldn't know. I think you'd do best discussing with your local State Farm sales agent, then to an approved dealer. However, I do know from experience State Farm wants to settle your claim asap, for as little as possible. They will offer you a payout (check) with estimates (at least three) you provide if you choose to get repaired on your own. If you go to one of their preferred repair facilities, then the payment will go directly to them; not you.
Also, don't forget to ask for $$$ for "depreciated value", but only IF the person responsbile is found and their auto insurance charged; as well as your deductible reimbursed.
So much to follow-up on, I know, but it's so worth it to get the coverage that YOU have paid for by having comprehensive auto insurance coverage, and State Farm is considered one of the best in paying out claims, btw.