I belong to testerone nation forums. All of them go with "Size On" by gaspari nutrition like how this forum swears by DD, Fi, exc. I have a tub of it and i gaines 15lbs from it. And you keep about 80% of your gains.
Just purchased some ARIMATEST and using it with the creatine and whey protein and wow that arimatest has boosted everything to the next level, granted im still a hard gainer but have noticed more gains since using arimatest. No side affects yet on it.