I personally love Sustanon 250. I used it as my first cycle and it was awesome. I did 250 mg/wk for 10 weeks. My diet was great, as were my workouts. I felt like a million bucks while on the stuff. People can say whatever they want about it, but I swear by the stuff. I get better gains than with cyp and enth as well as less water retention. I personally use Organon and have never tried Powerline so I can't really say much about that, but I can tell you to be ready for some discomfort the first few times you inject- that prop ester is a bitch! You get used to it after a while though and it won't be so bad. Anyway, good luck with your first cycle.
Hope that helps,
-terryd5150-