Little background, I have a dual battery setup (HellRoaring), a 12,000 lbs winch, 4-hi-output aftermarket 100 watt headlights, stereo and I currently have a 105 amp factory alternator.... As the subject says: How high amperage is high enough? Do I really need a 200 amp alternator? What are the benefits and or detriment to having one? Has anyone used this company? www.alternatorparts.com and specifically this duel rectifier alternator?