Newbie recommended to Flyertalk would appreciate any suggestions and ideas (a bit overwhelmed by all the info) - thanks.

Have been told that a OneWorld Explorer DONE4 ticket from Istanbul might be a good option (Cost approx USD 4500?). Might give two round trips to the US from the miles gained.

Data:
Based - Oslo, Norway OSL
Age: 35
Purpose: Private and business (own private company)
Generally felxible
Want a good long term global flying setup
Have membership with Star Alliance (15 000 miles)
Have membership with Delta Air Skymiles (10 000 miles)
Traveling regularily every year to Salt Lake City and San Francisco
Most flights out of Oslo are Star Alliance based

Vissiting this time (within 12 months):

Oslo
Amsterdam
New York
Washington D.C.
Miami
Salt Lake City
San Francisco
Guatemala City (November 2006 for conference)
Caribbean (Would like to go to a dreambeach somewhere in the Caribbean for a weekend)
Rio De Janeiro
Manila, Philippines
Hong Kong
Singapore
Oslo