Arp OMNI would be my number one choice. But if you want a ton of different opinions and rather heated discussions on the issue of string synth comparison here's an interesting thread from the past:
http://www.bigbriar.com/forum/viewtopic.php?t=2281&start=45&sid=5c364408152a0c03f061ddd33bef35f0

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A gentleman is one who never hurts anyone's feelings unintentionally.
- - - Oscar Wilde