ok im looking for a chip for my 04 150 extended cab 4x4. i pull a snowmobile trailer and a 22 foot fishing boat. what are the advantages and disadvantages if any of getting one. what is a good brand to get? i see alot of ppl get the edge but i hear super chip is good to or diablo. let me know and how much i should expect to pay for one. will this help with fuel mileage at all?