There's Vienna's Special Edition. $500
http://vsl.co.at/en/211/442/982/485/292.htm
Vienna's Symphonic Cube. $5000
http://vsl.co.at/en/211/442/484/349/216.htm
Eastwest's Symphonic Silver $265 , Gold $625, or Platinum $1075.
http://www.soundsonline.com/product.php?productid=EW-177
Sonivox's Complete Orchestra collection. $3000
http://www.sonivoxmi.com/ProductDetail.asp?Item=CDSymphonicCollection
Garritan's Personal Orchestra. $200
http://garritan.com/GPO.html
I also have the Vienna stuff that comes with Kontakt 3, of which Rudolpho speaks.
... But If your upgading to something better I recommend getting the Vienna's Special Edition, which I also own. It's inexpensive comparatively, and it has the best legato of any library out there, which vienna is famous for. It sounds real.
If you have the money, I suggest getting Vienna's Symphonic cube which is the sooped up version of the Special Edition.
Try things that you normally wouldn't... you might find the answer.