RE: What's your opinion on the AMA?
If you are in this hobby to count pennies. It's not for you.
Things that are more than AMA insurance:
1 digital servo
90% of new glow engines
4 gallons of fuel
5 channel reciever
The point is in any plane, even arfs without including radio equipment the planes are usually over $300. So who cares about $58 stretched out for an entire year of flying. It's $4.83 a month!!!!! $1.12 A WEEK!!!! GET OVER IT. If never use it, THAT'S THE NATURE OF INSURANCE. If you do, you'll be glad you have it.
You should be thinking more about flying than the cost of a paltry insurance premium.