[Kracka]

I used the brass ones from Speed-Source in my DSM's & IX and have the WORKS ones in my X. They feel nearly identical, the difference is just the noise. With metal bushings you hear the clunk-clunk noise as you shift, the WORKS bushings don't add any noise over stock but are still very firm and precise. I've used and like both, mainly it will come down to personal preference.

I don't like aluminum bushings though, they tend to bind and seize in the shifter cable rings and require far more frequent lubrication. IMO, go with polyurethane or brass.