Tony,
I had every intention on buying an onboard charger, until I saw the price tag...I think they are around $500 smackers. IMOP, there is very little inconvenience to carrying around a standard charger, not really a big deal. I would spend the money on other upgrades. Besides you could always stick your standard charger in the bagwell and hide it with some diamond plate or something similar and hardwireing it. I think you'll find it's a cool but not real critical to your carting lifestyle. My two cents.