Getting them from United It's 4 SWUs for hitting 125,000, assuming you do it in the fourth quarter - not sure about the case if you were already at 125,000. There are some posts on it in the UA forum. Two with the new promotion in addition to the two you get with the 125,000 mile Elite Choice program.
But how about some more suggestions on DFW runs - I've looked at HNL and it's a bit pricey. Right now I'm at about 16,000 EQMs for 10 segments on a pretty brutal run around the west and east for $402.