the monitors u r looking are very old
If i were you, I would look for some Benq models as they are relatively cheap like eg, EW2775zh (27") or a GW2470h (24", good ppi)
If price is no concern than look for those Dell ultrasharp IPS as they have very good stands.
However if the models which u stated are the only options i would go for the last one.
Reason : the first stand will have the same "low" ppi which u would hate. Between the 2nd and the 3rd, the 3rd is more future proof i feel.