Funny that you perceive the HFS/Vintage Bass combo as bright. The HFS to me sounded very middy whereas the VB was way too bassy (just to avoid the dreaded "m"-word).
Another vote for the Crawler bridge in the bridge spot. That is what I have in my PRS Custom (also a 24 fret model).
I found that in the neck spot of a 24 fret guitar the VHII neck is great. That is what I use in the PRS. It maintains some tightness in the low end but still does not sound thin or overly bright in the highs.
Cheers Stephan