I'm also planning on staying on my EQ @ 500-600 for a long time (5-6 months) As far as being on that long, I think EQ is pretty much designed for this type of "cycling". It takes about 2 months to really kick in, and it's a mild anabolic with a very mild side effect profile, so if you're going to cruise on anything for a long time, EQ would be my choice.
Lifthard, as for your original question, after my last run with tren I'm never running it again without cabergoline. I always run it with winstrol, masteron, or both, but I'm not taking any chances with that damned progestational gyno anymore.