tubular k-member???

[dinomite]

As was stated, you get some good weight advangages as well as improved suspension geometry. Those put together give you a much better handling car, and coupled with something like FMS B or C springs, the difference is amazing. If you've got the money, now is the time to swap it out; springs are easy enough to do at a later date, though you can also get tubular A-arms to go with the K-member (saving more weight) and those (usually/always) require a coilover setup.