Any good aluminum floor jack recommendations?

I've been eying the Craftsmen aluminum motorcycle jack (for my motorcycle) in the link above but Im not really sure I like it. I've read that particular jack rollers need to be "level" or it will tilt over. A guy said that I would need to take it out of box roll it around on a flat surface to check it. If it was out of "level" then I needed to take it back. Im like you spaz I want one that is lightweight but the aluminum sounds like it has problems. I borrowed my friends Craftsmen steal motorcycle jack and that sucker was heavy! But it worked great.

Hope your back gets to feeling better spaz!