SASless,
There are as many SAR configurations as there are Scotch whiskies.
The most prolific dedicated SAR bird is the USAF HH-60, with about 105 in service, I think. They share nothing in common with the S-61 and SARowl's list except the name on the pedals, but they can penetrate 350 miles of contested airspace, pick up a downed pilot and fly back, all in pitch black conditions. They have rescued crewmen in the middle of the Atlantic, 850 NM from shore, in December, at night, in sleet and iceing conditions.
I'll bet those guys could build a list of the "best" SAR aircraft, too.
http://www.af.mil/factsheets/factsheet.asp?fsID=107