Witric Power - Witricity Explained

I plan to use a wireless router if and when we do order the high speed internet through AT&T.... should I get the router before I order the internet (if I do) or take the one AT&T offers which is gateway? how much electricity does a router use to run all day? and what brand would you suggest me get for cheap? (not cheap-cheap but hopefully less than $50 if possible...)

if we do get the internest it will either be the basic or Express if you need that info...
and also, would it be safe to buy a router through ebay?
it's DSL... not cable Witricity: a witric one!

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