The TXM is made by CWT. The TX V2 is Seasonic though.
All XFX units are Seasonic OEM and the one Rammy listed is actually based on the M12 II.
By brand I recommend Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ, Antec an the higher efficiency Rosewill units. Hard to go wrong with any of those.