Vclavin,
Sure there are some good sons out there. Anytime a bull gets used as much as those two did you can find good sons. As far as Sleep Easy, probably alittle harder to find a direct son I would use, I know he is either the Sire or MGS of Millcreek Diversity. Diversity was a tank of a bull (nothing at all like SE) Had some daughters of Diversity, big high volume cows. Owned a son of Diversity that was a very good bull.
As far as 1407...
I keep hearing good things about LCC New Standard. It is early and I cant access any catalogs right now, but that is the bull off the top of my head.
While I am on the subject, one of my least favorite sires of all time (1680) is the MGS of the bull we have used heaviest (AI). Hated (strong word) 1680, so it took me a couple of years to committ to the bull. Kept seeing good calf after good calf and finally purchased some semen and one yearling heifer. I was not dissappointed until I had to test all of the progeny for AM. If it werent for that I would still be using him. Creates the best daughters for my environment/program. (good udders, great feet, good temperament, deep ribbed, good muscled cattle)