The JBA arms are $450: http://4xguard.com/commander-2006-20...ted-wk-xk.html
You're wasting you're time with the 2-jaw puller. Take the balljoint nut off, put it on a few threads, smack the spindle flat with a hammer and it pops right off. I've changed hundreds of balljoints/tie-rods/etc and never had to use a puller (ok except for Jacob's pitman arm....)
JBA's a solid product. This looks to be like another solid product with a few tweaks.
edit....to be clear i'll probably be ordering a pair of JBA arms in the next month or so depending on AM's input. I have to admit I love the "look" of the AM arms and im intrigued to try a uniball; but wouldn't order them in their current form over JBA.