we need trex. I don't trade in any of those sites

I don't think that Trex does any asset type of coins - and I believe that Storj is currently a part of CounterParty (clarification)?
Not sure why Trex won't do that; there are plenty of good coins that they are missing out on...
I recommend Poloniex from the list above. In many ways, it is better than Trex in my opinion...the only relevant difference is volume (but Storj volume is pretty large on Polo).