Passat shock absorbers

First of all introduce myself and thank you for this page that I just discovered.
My problem is as follows, I have to change the shock absorbers of my Volkswagen Passat of 2003 and assaults me the doubt they give me eel among the: Gas Monroe, Kib Excel of Gas, the Sanchs Super Turing, the Koni or the TRW; Talking to a friend, he tells me that the Monroe do not put them because they are not very good, but removing the Koni, of the other brands I have no references.
You could tell me something to take me out of doubts, the economic issue is a point to take into account.
Thank you.