Sorry I had it confused... both arimidex/ldex/anastrozole and femara/letrozole hurt your cholesterol/drop estrogen levels. The way these 2 anti e's work is they inhibit the aromatase enzyme. By inhibiting the enzyme which converts testosterone to estrogen, you reduce or even come close to eliminating estrogen production. We need some estrogen to be healthy. The major drawback to this is without estrogen; your lipid profile gets fucked.
Exemestane works differently. It does not stop the body from producing estrogen. Rather, it makes it so the estrogen is unable to bind to receptors by deactivating the binding enzyme. If the estrogen cannot bind, you simply will not get bloated or get gyno. The estrogen is crippled due to exemestane. However, since the estrogen is still floating around, it will not negatively affect your lipid/cholesterol profile.
Exemestane is what I was thinking of... But don't use it with nolva or your blood plasma levels will drop...