Weddingbee boards

I need some advice on paper weights.  We are printing the invite on white paper and mounting it onto a stardream cardstock (a little like Miss D'Orsay's invites she posted this morning).

Those of you that printed invites like this - did you print on a lighter paper or did you print on a thicker paper like an 80lb and mount that on the backing?  What would look more "professional"?

I plan to print the smaller pieces (RSVP, Directions, etc) on a 110lb

Due to time constraint, I have to print without seeing the stardream with it - which is making it more difficult to visualize...

Thanks!