I had a hard time deciding as well. I'm upgrading from an iPhone 3GS, so any phone I get will be a huge upgrade. I live in an LTE area (and the stores are not offering a discount) and I don't think the $100 premium is worth it for the SR. I was about to order the OG on Costco Online for $149 until I saw the SR being sold as an upgrade for $49. Either phone comes with an accessory package from Costco Online: cheap case, screen protector and mobile charger.