I have the Condor LCAB, and they are good enough. How much caster are you running? Caster has a significant contribution to steering feel and straight-line stability. You're looking for something like 8deg or more. I feel that my steering is very tight with good feel. I have an E90 330i with shock, spring and M3 control arm upgrades, and the Z4 is better.
Make sure that all of your tie-rod ball joints are tight and that the rack doesn't have any slop.
Neither matches the feel in my manual steering E30 M3, but few cars do.
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