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I dunno about over by you, but the LRR choices here don't really cost anymore than other tires.
To answer your question though, yes its still important. I don't have a link handy, but it was a TireRack article that said that 2/3rds of the rolling resistance of a tire come from the tread itself (design and material) where 1/3rd comes from sidewall flexing (which air pressure helps negate). So, buying LRR tires is still quite important.
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