Repoj, last I remember was reading that your body weight was in the 200's... IMHO you need at least 500 test, and no you WILL NOT get "Massive" gains even if you tried, it is not that easy and much less on 500 mg/week of test. 250/week is barely enough for HRT, specially on a bigger frame like yours.
I've read about "less water retention with Sustanon"... But never seen anyone I know claim this. Test is test, how slow it is released into the system does not affect water retention or more/less side effects, whatever they are.. JM2C
Garo, I don't have much experience with Winny, but when I did run it I drank it and felt the effects very strongly. I only injected it a few times and the pain was crippling for days after the shot.
If you want to avoid water retention just run Arimidex, that'll do it.