The original OP probably meant to ask that is it more appropriate to have a regular, blessed by a validly ordained Catholic Priest, and used for each time you pray the rosary.
Do you guys and girls think that owning several rosaries, of course all blessed by a validly ordained Catholic Priest, takes anything away as if you were not being monogamous?
Curiouser and curiouser! 
Are you referring to your own marital state here? Or is this a hypothetical question?
:really-mad2:
I mean, let's say it's Tuesday and you prayed the Sorrowful Mysteries with a rosary made of sterling silver and the beads a blue lapis.
Then, Wednesday rolls around and you decide to use an all wooden rosary with twisted rope/cord between the beads.
That's what the poster probably meant by switching out rosaries.
:really-mad2:
The reason this is asked is because I am reading the book "The Song of Bernadette" and at one point, Bernadette uses another girl's rosary and Our Lady notices so, very quickly, Bernadette retrieves her own rosary.
Are there any supernatural attachments to particular rosaries that we may have used for many years in a row and that this line of attachment may be broken if we knowingly switch out our rosary.
I am just asking aloud and in front of others.
What do you all think?