Whilst I'd always recommend EastWest's stuff (it's ridiculously good), I'd be careful with investing in something so expensive from the get-go!
Unless you're thinking of breaking into a career in music, I'd suggest looking for something smaller first.
I didn't start with EastWest, I started with the rubbish Sibelius Sound Sets, then moved to Kontakt and its factory vsts...THEN I moved to EastWest!
What Vafrous said makes a lot of sense, it's good to get some experience with smaller stuff first, as if you play about and find this isn't really for you, you'd have saved yourself a small fortune!
But if you want to know about EWQL Symphonic Orchestra, then here's the low down:
It's great, but you need a decent machine to get the full potential out of it. The samples used are very large, so loading a fair few at once will eat up your RAM very quickly!
There are a lot of settings with it, but it has a few which save you a lot of time. Like the portamento one, which you just turn on and it'll imitate it for you! And even if you don't like a specific section with it, you can adjust the portamento yourself if needed!
You need to know your musical terms, as there are a load of articulations that would probably be alien to a regular joe who doesn't know their musical terms! (Terms like staccato, legato, etc)
But I've used it so much! The samples are great! It needs some woodwind clusters though, as it seems to be lacking them...
I got the Complete Composer's Collection, so I got a load of other stuff too!
Here's a brief review of others I have:
EWQL Symphonic Choirs (Get it, they really speak! Fantastic amount of samples in there!)
Pianos Gold (Really nice, but some equally good ones for lower prices out there...)
Goliath (Has a bit of everything really...plus stuff that doesn't fit anywhere else! I've only used the organ in this, so probably not worth the money if you already have samples that you want!)
Stormdrum 2 (Epic drums, the Middle Earth Ensemble is probably my most used percussion!

Seriously, if you want to make action music, you NEED this!)
Gypsy (The solo violin in this is fantastic! Lots of accordions and acoustic guitars too, a decent purchase!)
Ra (Used it once or twice, seems pretty good! A nice selection and some epic didgeridoo samples!)
The Dark Side (Really distorted and electronic stuff, very cool!)
Voices of Passion (Really nice, but you won't be using it much, they're more for one off pieces...)
Ministry of Rock 2 (Haven't used it properly yet

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