the vandersteen 1b/c's have a pretty small footprint, so I don't think that would be a real issue if they are going on the floor...if they are, don't forget...if you buy monitors you will also need stands...and then not only that, but most stands have spikes so you will then be spending another 50 bucks minimum for floor protectors if she has wood floors in her apt...If the spekers are going to be on a bookshelf or wall mounted...both of which will sacrifice some sound quality, be sure to look for a front ported design.
Ellery