Wherever you see a DC-10-40 today, that's where you'll see a 753 tomorrow. Don't count on any 333s operating domestic routes, either. As was mentioned, they're a good choice for those European routes because of their great cargo capacity, but for domestic it's getting the passengers there as cheaply as possible that counts. The 753 will be very hard to beat on that score (regardless of the implications for passenger comfort vs. a vs. a widebody).
Dave in Berlin
Too many types flown to list