100K for Trans-Atlantic BE saver.... ie Europe.
120K for Tran-Pacific BE saver..... ie Asia (Japan, China, etc).
And 150K for Australia BE saver..... ie Sydney
Truly international BE saver awards are by far the best use of miles, based on cost per mile used.
On the other hand, if you have last minute domestic trips to take where the last minute ticket price is very high and a saver award (whether economy or first class) is available, that also can be a good use of the miles.