Inventory of my last mods.Or latest, whatever..LOL
First in the series is a special rear view mirror called aspherical. What it looks like is a wide angle view so you could see more, plus the edge bends and becomes even wider. Atomic80 & Larry are the ones who bought it to my attention; I believe it is standard for European car (please correct me as needed).
The verdict: It absolutely, positively works and is a pleasure to use. Not only does it makes the rear view more interesting to watch (you see what I mean when/if you have it), it also makes driving safer IMHO as the stock mirror admittedly gives too small of a view. I know you are supposed to look every time you change lane but there will be times where these come in very handy. For example my neck's range of motion decreases as I get older and I can't turn as much. Kidding...
Now you might want to sit down when I tell you the cost. Remember this is not just any mirror, it's Porsche mirror , and it does have an electrical board in the back to make it dimm-able just like the stock mirror. I got it for US $315 per side, 630 for the pair, from www.sunsetimports.com. Part number is 997 731 035 05 for the left side of the car, 997 731 036 05 for the right side of the car. Installation is free from my Porsche shop, Lucent in Los Angeles and it looks like it *should* be no more than a few minutes if you know what you are doing.
Kidding aside, I *do* think that it makes driving safer, so it would get my highest recommendation.
View from stock US left side mirror: