I've read good things about all of them as well. But, going stricly by what I've read, I would go w/ the transdermal Formestane over the Formex. My friend is using it right now and after a week of use bought 3 or 4 more bottles.
I've used stoked and really liked it. At the time though I wasn't using it at it's full dosage, yet I was still seeing a slight boost in mood and energy during the day and libido increased. Have not used the other 3 YET. I think in October I will be creating a stack based around Glycobol and Transdermal Form. Can't wait!