realskiers

Not sure, but I am going to guess about 3 lbs or so.  Her Opus hardtail is pretty light.  And stiff.  And fast..... 

Edit:  no specs online on weight of the Opus complete bike, but frame weight is only 1150 grams / 2.53 lbs (but they don't say what size that is for).

FWIW, one of the reasons I was considering the fork upgrade (aside from performance gains), was weight saving.  The Recon fork on there now is just over 4 lbs, whereas the higher end RS / Magura / Fox models are about one pound less.

I don't know how much she would like the full-suspension ride as her daily driver.  She sure likes the responsiveness, acceleration and climbing power of her hardtail.  Very quick and agile little bike.  I can see her picking the latter for the smooth trails in our local forest -- I've mentioned this before, but the local singletrack is really pretty smooth and flowy.  We also do regular rides on a flat gravel rail trail just for a constant cardio workout.  However, we do ride about once or twice a month in some forests where there are bigger rocks and rock gardens, heavily root-bound trails, and generally more challenging conditions where some extra cush in the rear end would certainly help out.