I'd suggest Master Kush. It was super forgiving to me through pH issues (calibrate often!), some slimy gunk (h2o2+hydroguard=slime) and all my plants turned out female without herming (so far, two weeks into flower). Also, I'd say start with good genetics if you set everything up right, have a good knowledge base, and have a plan set out. Its worth it to start with the good stuff. But if you are just going to pretty much wing it and learn from trial and error, grow bag seed first.