Innova / Discraft would probably be the safest stock purchases right now, but also would provide the lowest long term profit due to high stock prices. For long term investment with a higher return, I would invest in Dynamic Discs if they were a public trading company. Just my opinion, but I see them distancing themselves from "trilogy" in the near future to better concentrate on their own brand. I could easily see them surpassing Discraft in the next few years if not sooner. Very impressed by their aggressive social marketing.
Prodigy took the more serious / pro approach. The problem with Prodigy imop is, they just don't have the "fun" factor attached to their brand, it's all too serious if you ask me. I think it worked at first to get the interest of "pros" but in the end, we know the buying demographic is probably 90% am vs 10% pro, and the buying ams just seem a little confused by their marketing strategies.
Discraft seems to be stuck in the middle of trying to be "fun" and "serious" and in the process, I think it's possible that new players are over looking them. I was a die hard Discraft guy 3 years ago, and now I don't even consider them an option. I can't explain it...perhaps Innova and DD have just done a better job exposing their discs to me. Someone said Discraft makes a killing in the Ultimate scene, perhaps that's their main money maker and are content with that.
Wouldn't shock me if the other players gobble up each other and attempt to take on the bigger players in the coming years.