I can't believe some of these responses. It amazes me that these guys are actually driving cars and not still running around in horse and buggys!

Use the 906's to anchor your dingy or something like that - or sell them to one of these die-hard iron fans. The simple fact is you'll end up spending more money than the cost of the Stealth heads to get a 906 to perform to the same level as an "out of the box" Stealth (just read the specs !!) and then you'll be left with very little room for future improvement. The Stealth, on the other hand, has all the good stuff right out of the box AND has a ton of material left for future improvement. The weight savings was already mentioned. Consider resale value as well. "Brand new" should also be worth something!

As for asking so-and-so about this and so-and-so about that, HELL, call up 440Source and get it right from the horse's mouth !!!!!