All three have apparent strengths and weaknesses.
Donald is a legit 4 tool prospect who jut happens to be behind Jimmy Rollins in Philly, so I would expect either a trade, or a positional switch.
DeJesus is a guy who has good bloodlines and will eventually make it to the show, however, I wouldn't be surprised to see the Dodgers deal him for pitching this year, as no one tool profiles as exceptional.
Valaika is probably the least heralded of the 3, yet the one I like the most. He is a rtrue baseball rat, and is the type of player that franchises tend to keep. His instincts and good lateral ability make up for some physical deficiences, such as a fringy arm for a SS. He plays in a great park, and he will probably make up the left hand side of the Reds infield within 2 years