I have used MOPAR performance &/or Crane wires, both good, Cranes from www,raceandstreet.com Plugs have been Champion Platinum 7570 or Autolite AP5263 Platinum Plugs, both gapped at .040, dialectric grease for the boots and anti-seize for the plugs.
Just filled up from a 125 mile highway trip and got 26 MPG, mileage today was 1430, so isn't broken in yet.

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2008 Silver Steel Metallic, Touring, NA, Sirius; Chromed door handles; lower grille; fog light surrounds; chrome front & rear bumpers strips; Airaid air filter; Bassani duals; Modesty Cover; Autolite AP5263 Platinum Plugs (.040); Crane Plug Wires; NAPA Ceramic pads; Blane hood struts; PTeazer Gas, Brake & Foot Rest Pedals, '05 Rear Step Pad, Stainless Door Sills, Llumar tint, "A" Piller chrome; APC Strut Bar