I can't deside wether to save and get the upgraded electronic mirror with auto dim,compass,and temp. from mazda. Or get the convexed mirror from razo? Has any one used a convex mirror before? I like the idea of having the luxery of the mazda thing but I think I would like the function of the "broadway" mirror. I dono I live in a city where you have to change lanes alot so if its better I will prolly get the convex one. What do you guys think?