i am looking to get a shifter to pick my e.t up some. i dont know which one to get. i like the electric shifters, but i havent heard much about them. i would like an air shifter but i dont know if i should get the one where you fill the bottle up and its good for about 400 shifts or should i get the one that has the compressor with it? any ideas? how much should i be expecting to pay and does anyone know where the best place to get one at???