The brand discussion has been done the death, search for the thread where we had a flame war over it and you will learn more than you ever want to.
As far as prices, have you guys checked out Toyota of Dallas and Newnan Toyota? They are the 2 cheapest dealers I have found. I order from both, they are usually within a couple bucks of each other.
Either way, for LBJ's and OTRE's, I'd only trust OEM.
Also, while I praised Sankei in the other thread, I will always cast some doubt on a company that isn't the actual OES for the vehicle because only the actual OES has the quality conscious OEM on their backs about quality. Being a competitor for the OE contract (like Sankei is) is good, but if they didn't win the contract, then the OEM isn't breathing down their back...
Also, always remember that Sankei/555 may only have produced the castings, any aftermarket LBJ could be rebuilt, which means the ball could be cheap aftermarket even if the cup casting is high quality OEM.