The tubular K-members are usually not as robust as the stock unit for a daily driver, but the UMI Road-Race K is really a nice piece if you decide to go that way. Extra gussets, dual tubular design, etc. It's not quite as light as the others, but I'd trust it on the street more... and you still save like 25lbs.
Get the whole kit from UMI with the upper and lower a-arms with the roto joints. Then you end up saving over 30lbs and have more adjustability in the front end.