New York is the busiest business route accross the pond so it makes sense to start on that route...
With only 100 pax the 767 should have quite a long range so dont rule out routes that would normally be a stretch with 300 pax + Baggage!
By the end of the year as they get more aircraft Silverjet should have a few different routes and higher frequency that suit the business traveller
Goodluck Silverjet!