Re wistle, try driving with your driver's side window down. Mine has a wistle above 50 that comes from the pivot between the mirror housing and the part that attaches to the body. I can place a finger in front of that pivot while at speed and it stops. Folding in the mirror slightly also stops it.
My truck was repainted at some point, this could be a related artifact.
My '99 LX had the same whistle from DS mirror. It was friggin' annoying.
BTW for my wind noise referenced earlier in the thread, stuffing the weather stripping with foam did nothing other than to cause a rip in the stripping. Oh well...