To GarryGraves: yes to mount the Wink mirror you would drill into your headliner and inner sheet metal, then use some small diameter sheet metal screws (like #8 or #10, about 1/2" long) to secure the mount brackets. Please see my writeup.
ALWAYS use a drill stop (lke some tape wrapped around your drill bit) when doing this, to avoid bursting thru the inner sheet metal and denting the next layer of metal, which is your roof. (I once did that on my 1972 Corolla....). To help dampen vibration, you can retain the mirror neck of your OEM mirror and brace the Wink mirror against it.
I don't recommend mounting onto the windshield, I've read too many stories about the mounts not sticking and the mirror falling off.
I will say that if your OEM mirror has problems staying adjusted with your subs, then you may not have much better luck with a Wink mirror. Since one tends to angle the mounting straps forward and thus cantilevered in order to clear the sunvisors, it invites the Wink mirror to vibrate. It -is- possible to mount the Wink mirror so this doesn't happen (especially if you use a 3rd mount/brace point in the middle) but it takes care during the installation.