Without these questions answered, it's not going to matter which technology you choose because it will probably be wrong.
Aren't pretty much all technology selections wrong, it's a matter of the extent to which they're wrong? :P
I completely agree that you need to be clear what you're looking for from a product or technology. I've seen SWOT applied to technology selection and it's ended up reading more like a high-level Gartner report than a project-specific comparison.
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