For similar price, you can get much better pianos than Yamaha.
http://www.walterpiano.com/
http://www.whatbrandbest.com/bestbrand/brand-3-6467.html
A rating of pianos. For upright, CW is in the Group1, and Yamaha in Group3.
http://www.thepianoreview.com/piano-ratings.html
You can also read "the Piano Book" (borrow from library if you do not want to buy) to see more details.
Comparison between CW and Yamaha:
http://www.pianoworld.com/forum/ubbthreads.php/ubb/showflat/Forum/1/topic/016251/Number/0/site_id/1#import