Anastrozole(Arimidex) is far more effective than novaldex. Gets rid of 95% of circulating estrogen.
The downside is that this lack of estrogen gives you a horrid Chol/Lipid profile.
Adding 10mg Tamoxifen, which is a weak estrogen that binds to the ER's will ameliorate your chol/lipid profile back up to normal.(Or somwhere close to it anyways)