Dim Pro is actually pretty good. Even the often-overlooked TTS-1 does a decent job.
Randy Bowser (rbowser on the forum) and I did a shootout a couple years ago that included every string library you ever heard of. We offered a cool prize supplied by Gary Garritan to motivate participation, and got more than 40 submissions. Participants ranged from casual orchestrators (like me) to experienced professionals. Everybody worked from the same MIDI file, the Star Trek theme. They could use any library they wanted, as long as they used just one.
At the end, the lesson we all took away from that exercise was this: it's 99% skill and 1% which library you use. Learn to orchestrate properly, and you can make any sound source work.