I've used Tornell and Brovel with success, although many people don't like their products. Proviron is used during the cycle to prevent gyno, nolvadex is used if gyno sets in to halt it. If nolvadex is used for the whole cycle it may prevent it. Go with which ever you can get cheaper. I personally like using proviron post cycle.
i have had good results with tornell t200, never used the other one. cant help u on the gyno, never used either one, for some reason i dont get gyno, even when i go up to 15 dbol tabs a day and a 1500mg of test. hehe!