If submersiable, then it is defintely Ehiem first, I don't know how to rate the next ones in line. But I heard Quiet ones had restart issues. I don't know if they were fixed in the new models.
There are a lot of options. Lets find out a little before we answer this. External or Internal ? Are you running any other reactors off of the pump ? How much head will the system have ? How many times are you planning on turning over the volume in your tank ? Is this pump going in a cabinet ? Do you need a dead quiet pump ?
Running a quiet one 4000 internal for about 1 and half years without incident. I love the pump but Eheim IMO are aces, I have a small eheim on my sulfur denitrifier and you don't even know its there.