Sir i agree, i'm also an anti-tinting guy. actually recently in an exhibition, i saw some products of 3M, they had some sheets, which didnt allow sun's uv rays to enter, hence keeping the car kool, and didnot disrupt the view at all either... i'll try to find an e-brouchure for your reference.
actually i've done some research with the sun shaded thingy, they donot let sun rays enter the car, but they do considerably raise the ambient temperature inside the cars. my car stands in the sun for the entire day (9am-6pm) initially i used sun shades, but they didnt work that well. now i have a flourescent colored cover for the car, & you wouldnt believe it, the car stays perfectly cool till the evenings. although its a hassle to cover & remove it, but atleast it works....