I found this thread looking for something else, but since I wrestled over this question when I was looking for sunglasses for tennis I thought I'd post.
I bought the Oakley VR28 Black Iridium in December and am very pleased. I did not get the polarized b/c I also boat and polarized glasses do funny things reading electronics and seeing through some windshield glass. Though ironically polarized glasses are great for fishing and glare off the water.
On the brightest days some may find they don't filter enough light (18%), but that was intentional on my part b/c I mainly wanted UV protection and clarity, not overall dimming of the light. They do definitely help when having to serve facing the sun, but do not completely eliminate the issue.
Oakley says they filter blue light to increase contrast and improve depth perception and I think that is pretty accurate. After a few minutes of wearing them you forget you have glasses on at all. I actually pulled over in the car this weekend to turn around b/c I thought I had left my sunglasses behind...only to realize I was wearing them.
The tint from the outside looks primarily brown with a hint of rose to them. I paired them with root beer colored frames and the larger XLJ lens size in the Half-Jacket frame style. I like the look of the Flak-Jacket frames better but they fit me a little too loose. There is a bit of rose tint when you first put them on but it fades. I sweat pretty freely and haven't had fogging issues while playing except once in a while during the changeover break if I leave them on. I usually remove them and towel off during changeovers and don't have any issues then.
Here are a few links:
Lens color reviews:
http://www.o-review.com/lensdetail.asp?ID=1152
Oakley site:
http://www.oakley.com/pd/2003/14083
*Note mine are the VR28 w/ Black Iridium...there are a few varieties of VR28. I'm not sure which will pop up with the above link. You may have to select from the drop-down box. BTW...don't put a lot of stock in their website "Lens Tints" simulation pictures.