Which iOS device should I purchase to use for development and testing?

I have the original iPhone, and so far I have been using that for testing the iOS apps that I have been developing.
I am in a dilemma as whether to purchase the iPod touch 4th Generation, or wait till I save enough to get the iPhone 4S.
I don't really need to use the device as a phone. In fact I would mainly use the device to test performance etc. I try to design the app to run on the original iphone, since that is the most constrained for performance, and I imagine it would run well on the other devices since they are faster. As for retina display, I think I can use the simulator.
Do I really need to get a new device at this time?

>I try to design the app to run on the original iphone, since that is the most constrained for performance, and I imagine it would run well on the other devices since they are faster.
Sounds good on paper to you, but in reality it doesn't mean much. You're not testing with current software, so you have no idea about compatibility and if it's not compatible, speed won't matter. Not that your logic extends to real-world....
>As for retina display, I think I can use the simulator.
The simulator is not an emulator - all you're doing is testing a stack built for OS X/i386 and your computer monitor. You have zero confirmation on quality and layout on an actual device.
Without details about your apps and goals makes it pretty tough to say what you should/shouldn't do next except to say yes, you should have a newer device

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Message was edited by:
Timin
Message was edited by:
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