Hello,
Booth Gyres, will d perfect as pair on on your tank, this will help to have much more different patterns of flow and no dead spots
One of the Gyre 250, will also do the trick, but I would never say it will be better thank 2 of them.
Personally I recommend that no matter what you choice will be, start with one on any size then add the other one as you see it fit the bio load on your tank