I'm auditioning the Tungsten interconnect against some JPS Labs and VooDoo interconnects, all in the $1.3 - 2k per pair range. The Tungsten is hands down the best of the bunch and the difference is readily noticeable. It significantly expands the soundstage and images more palpably. It also does subtle things such as instrumental decay better, probably by virtue of having a quieter background. Instruments sound more articulate and nuanced. I haven't noticed greater bass quantity but it is better defined / tight. I agree that there are gobs of high frequency details and it will a few days to decide if it really is more details or just punched up artificially. But overall this is a very enjoyable cable.
I've been using the silver tuning bullet. The other two are a bit too dark or liquid sounding for my taste (I prefer open and airy) but I could happily live with the grey.