jmartin, I don't know about the rest of your math, but I am familiar with the Gold Points/Radisson Gold Rewards programs.
Your 10,000 Gold Points could be turned into 1,250 Delta SkyMiles, rather than only 1,000.
How? If you redeem them via Radisson Gold Rewards, the ratio is 8 points = 1 airline mile:
http://www.radisson.com/goldrewards/home.jsp?P1=redeem
"Exclusive Radisson Airline Partner Rewards
Only a Radisson Gold Rewards member is entitled to redeem Gold Points to airline miles at an 8:1 ratio. PARTICIPATING AIRLINE MILES PARTNERS: Air Canada, America West, American, Asiana, British Airways, Cathay Pacific, Continental, Delta, EL AL, Gulf Air, Icelandair, Latin Pass, Mexicana, Midwest Express, Northwest, United, US Airways"
(This is always confusing to people, as the ratio mentioned on the Gold Points website itself is 5,000 points = 500 miles, and the only airlines mentioned are Northwest, US Airways, and Delta!)
Kathy