I want to buy those blind spot mirrors that stick on your mirrors. I had them on my eclipse (the round ones) the car looked nicer plus i could see..the blind spots. Now i wanna put some on my 330 so i have 3 questions: 1)should i go for the round or the square ones? regular or tinted? 2)where can i get good quality blind spot mirrors? possibly being real glass? i don't want the type they have at walmart etc. and 3) should i put them bottom corner or top corner, left or right?