Commuter case or defeder case for Iphone 5 (otterbox)?

I was just wondering which would be best for me. I want a case that suits my needs; protective, practical and not too expensive. I was wondering if I should get the otterbox defender or commuter case for the Iphone 5 because supposedly the defender is stronger, but the commuter tends to fit my needs and is cheaper. Which should I get? Oh yeah, I'm also like, really clumsy. So I don't mind bulkiness that much but you know. So which should I get?

On the iPhone 5, texting can be aided by the voice assistant, which converts speech to text. In addition to regular texting, messaging on the iPhone 5 supports iMessage, a specialized instant messaging program and service that allows unlimited texting to other Apple devices running iOS 5 or later. This supports the inclusion of content such as images and sound in text messages, integration with the device's voice-controlled software assistant, and read acknowledgements for sent messages.
http://www.NewiPhone5.co.uk
Input to the device comes from a keyboard displayed on the multi-touch screen or by voice-to text by speaking into the microphone. Entered text is supported by predictive and suggestion software; there's a multi-language spell-checker which recognises many regional accents of different languages. Initial demand for the iPhone 5 exceeded the supply available at launch on September 21, 2012, and has been described by Apple as "extraordinary", with pre-orders having sold twenty times faster than its predecessors. While reception to the iPhone 5 has been generally positive, consumers and reviewers noted hardware issues, such as an unintended purple hue in photos taken, and the phone's coating being prone to chipping. Reception was also mixed over Apple's decision to switch to a different dock connector design, as the change affected iPhone 5's compatibility with accessories that were otherwise compatible with previous iterations of the line.