Dynaformer produced nearly 1300 registered foals, so it’s not like they’re all THAT hard to find. He does have a good aei at 2.31, so his get are generally talented. His babies earned over $133M from 1061 to race. Here is an article discussiong his worth as a broodmare sire.
Dynaformer also appears on the top steeplechase sires list, so he produced jumpers as well as flat racers.
Vineyridge did say the dam side was “lovely from top to bottom” on the thread over on sport horse breeding. Perhaps you can ask her to elaborate on what she likes there.
This mare has produced a stakes placed horse by Barkerville, and is half to a fairly useful racehorse named Spy Hopping by Black Tie Affair (16 starts, $67,350 won.)
Her dam, Lorilla, is half to a stakes winner over hurdles in England, which is pretty exciting from a sport horse perspective. She may have produced more, but my APR won’t list European records.