I love this 3 piece modern bedroom set by Little Linens available for $45 from Circus Dollhouse.
I wouldn't call it modern and not exactly contemporary but I love this couch. The "Cosmo" Living Room Set is available for $59.95 at The Magical Dollhouse.
"Contempo" Leather Living Room Set in white or black would probably be better, but I really like the arms of the "Cosmo" set.
(Bed image from www.circusdollhouse.com. Couch images from www.themagicaldollhouse.com.)
Jan. 16 Update: Thanks Anonymous for the link! This couch and chair are incredible, except for the price and color. The Modern Chair and Sofa set By Arlette runs for $320 on www.spminiatures.com.
I love these coffee tables. The Nagouchi table on the right and bench table on left run for $33. Leather and brass furniture are $45 for sofa and $33 for chair. All at www.spminiatures.com as well.
(Jan. 16 update images from www.spminiatures.com)