$750 is a hefty price. Ive seen similar "tubular A arms" with corect lowered geometry sell for about $250 from other makers. They are probably not the "heavY duty" your getting for $750 but they are probably considerably lighter and could be replaced 3 times and youd still have paid the same amount though if your destroying A arms like that you should probably go with the strongest ones available. Here is a link to a set of cheaper tubular A arms for lowered trucks ..... someone more knowledgable can tell me what the difference is.
http://performanceonline.com/store/c...cat=275&page=2