Twister6 posted are view of this quad BA driver IEM on Head-Fi.
Pros: custom-like universal shell design, very comfortable fit, great isolation, bright revealing tonality with plenty of low end impact.
Cons: slippery shell, included eartips selection could be better, additional cost of earwax replacement filters.
d marc0 on Head-Fi has a comparison review of the Noble Savant to the InEar Stagediver 2. I have yet to hear of a negative view of the Savant. I will need to listen to one at my next meet.
Noble Savant to the Stagediver 2
Here is a link to a review of the Stagedrive 2 by LJOKERL on theheadphonelist.com
InEar StageDiver 2 (SD-2) Review