wordlwidedreamer, the Hilton "Delhi" is the Trident Hilton Gurgaon, a bit closer than New Delhi but with lots of freeway construction on the Delhi - Jaipur highway (National Highway 8.)

The Radisson is OK, they have a shuttle service to / from DEL, and is ten minutes away (though a chicane at the airport drive entry can back traffic up into the roundabout and slow things down a bit.) Context: I was there less than a week ago.