don't do the transfer:
From Chicago to most of Europe a business class award will run you 120,000 British Airways miles. Normally you'd need 100,000 Starwood points to get there (transferred over the course of two days you'd get 125,000 British Airways miles.). With this promo it takes 80,000 transferred over two days, and you wind up with 130,000 BA miles.
http://blogs.flyertalk.com/blogs/viewwing/
The Flyertalk guru is not accurate; Many European destinations from any US Gateway are only 100,000 BA miles in Club class --
Europe Zone 1
Belgium, France, Germany, Ireland, Luxembourg, Netherlands, Switzerland, Utd Kingdom
Aberdeen, Ajaccio, Amsterdam, Barra, Basle, Bastia, Benbecula, Berlin, Berne, Bordeaux, Brussels, Campbeltown, Dresden, Dublin, Dusseldorf, Edinburgh, Frankfurt, Geneva, Glasgow, Grenoble, Hamburg, Inverness, Islay, Isle Of Man, Jersey, Kirkwall, London, Londonderry, Luxembourg, Lyons, Manchester, Marseille, Montpellier, Munich, Nantes, Newcastle, Newquay, Nice, Paris, Shetland Islands, Stornoway, Stuttgart, Tiree, Toulouse, Wick, Zurich
60,000 Starpoints translates to 97,500 BA miles; therefore 62,500 Starpoints will get you a business ticket even from West Coast.