You are indeed correct - you have been fortunate in landing those three.
There's nothing wrong with training all three. I would focus on guard skills, and Ðô will benefit from that as well. The best players are well-rounded, and you could keep all three. You'll get more money having trained Ðô a bit more too...
http://with-malice.com/ - The half-crazed ramblings of a Lakers fanatic in Japan