my last cycle involved 1000mg of test enanthate for 16 weeks with no anti-e's. Sides were kinda bad, but gains were unlike anything I have ever seen. I had no gyno problems at all.
Sides included: high bp, lots of water retention, and thats about it. I have tried it both ways, with anti-e's and with out. I will never again do another cycle that involves anything more that 500mg per week. I mean with proviron, there really is no reason.
I am not going to jump the gun, and say that anti-e's inhibit gains. But now that I think of it, my best cycles did not involve any anti-e's. If you decide not to use any anti-e's, you will just have to live with lots of water retention. If you use proviron, you can use a lower dose(because of the increase in free T)which means less sides.
All in all, everyone will have to decide for there self.