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MSD wires are usually one of the cheaper aftermarket ones to go for. I know ws6store has another brand that is a bit cheaper, but I don't think summitt has them. I like NGK plugs, but it isn't a huge deal what you get.
Just stay away from Platinum plugs. They have higher resistance so they have a colder spark. Copper or iridium plugs have about the same spark, but the only issue is cost.