Perry Jones is an amazing talent, but the guy doesn't play a winning game. No D, no rebounding, bad shot selection, soft, bad court vision/passer/selfish? Dude is a gamble if ever there was one.
I'd take Irving or Williams over him easily at this stage. Probably Terrence Jones as well. Jones is very tantalizing and tempting, though, but his head is not in the right place and that's not the easiest thing to correct, especially for a high lottery pick (guaranteed the most money, increased tendency to think more highly of themselves than others might, would have a greater tendency to believe they have an inordinate amount of power for a rookie thus more resistant to change).
I'm not saying he's a bad kid either, but there are some very significant on court issues.
Also, call me a xenophobe, but I have no interest in Kanter or Valanciunas.