For orchestra overall, I highly recommend Musio. It uses the Cinesamples library and what's good about it is it's a subscription model, so you can try it out and only pay like $10 a month to see if it works for you. I find the sounds to be really good and the interface is very user-friendly.
But 100% also what Bradley said--if you don't learn how to program the strings properly, you'll still get the dreaded "sounds fake" feedback.
Hope that helps!
Edit: After writing this I realized this thread is a year old haha. But for anyone *else* wondering, I stand by my recs!
