The usual FABO hating has already begun. K-member looks great man...nicer than most anything Ive seen on this site or other automotive sites. Triangulation would be great for stiffness yes, but Im fairly certain the factory stuff wasnt too resistant to flexing.
On another note...any more pictures of the lower control arms? Looks like a single piece of tubing coming out to the spindle, with the strut rods to locate it? If so, thats a good idea...I've thought of doing them this way as well. As long as that single tube is stout enough, I dont think you'll see any issues. Post more pictures if you can.