I have all 3 of those and the truth is they all have there places and for anyone to say one is better then another needs to have there head checked. So before any suggestions are made please tell everyone what you want it to do because your question is way to vague. Tell us about the system. what your planing on keeping? All of this means a lot. Plus what is your budget?
Not sure if this was directed at me as I was simply listing the 3 most common power heads out there listed in order based upon price and quality.
I agree with the fact that your inhabitants will dictate the pump you want, to an extent. No matter what, you have to introduce flow to any system or you're going to have issues, especially 300 gallons.
As far as stating one is better quality than the other. I think my post was spot on. I own 2 Jebao WP-25's and can say the quality is not all that great. I had to take a razor and clean up the grills of leaked plastic from the molds. I've never seen such poor molds on Tunze or Vortech. Which leads to my next point that the Jebao and Tunze don't operate well between 1 and 29% power. While the Vortech does. This is a design flaw.
Furthermore, Tunze and Vortech have a good track record of being reliable. The jury is still out on the Jebao. But I've found that diligent maintenance seems to keep them running without issue. (Every 3 months) We shall see.
Now when you look at price that's a whole other story. I'm happy to say that I bought the lesser quality Jebaos at 1/8 the price of a Vortech. Some argue the Jebao flow is superior. The stolen Tunze design, in my opinion is great as you can direct flow down the length of the tank without having to place the pump on the side glass which stands out like a sore thumb. And even if I get a couple years from one, to me there's more value as I could buy 8 for the price of a Vortech and still run the risk that the Vortech breaks after the warranty period. Which happens all the time as with anything. This is just my opinion, but I believe the Vortech pumps are outrageously over priced. Sorry, but I'm not spending nearly $400 -$500 to move some water. To each his own. But the quality is there.
So this is the logic I applied to my decision. Again, not sure if this was directed at me, but if it was I'm pretty confident I don't need to get my head checked. If not, then this post can serve as why I went with Jebaos. ;-)