You're looking for too wide range of instruments to get GOOD quality. Not that a sample library of 40 GB will be bad quality...
Here are a few choices for you:
1. Upgrade to Kontakt 3 for a few $. (around $200? not sure). Along with K3 you also get some 40-50 GB of samples, from all rounds of instruments. Problem solved!
2. Go for the EW Colossus, which is exactly what you're looking for. A little bit of everything without amazing stuff on anything. Newer version (not sure if out yet), is Goliath. Same thing, newer engine (not Kontakt based). Another option would be Muse from Sonivox. Same thing all round.
3. Get a few cheap-ish packages to get going.
You can get Silver for $300, or GPO for $200 if not mistaken. You can also get Kirk hunter for around $400 which is very very good (for Kontakt 2, the other 2 are using their own player). So you get orchestral covered.
Then get EZ drummer 1, or something less expensive, drums covered. Then get a few instruments from kong audio for example (for chinesse INexpensive samples), or get EWQL RA (for more expensive and more all round), or get Bela D Media ethnic stuff (don't remember the name now), and you get your self covered 95%...
4. Start low. In all reality if you buy something cheap and move further you WILL need something else later on, so it's more money, and more for something you won't use in the end (the small-ish product). Save and start buying something to last you years. Don't get GPO or Silver, go for Gold (EWQL I mean). I'm still using that. DON'T get some cheap drums. Wait 6 months and get EZ Drummer 2 (woah! Amazing). Don't get 1 insturment from somewhere, get all the bundles from Bela D. Media winds, or EWQL RA.
etc...
You don't get to build your studio all at once, all at the same time, with limited budget. You could potentially spend... $2000 (an example) a year and get a brilliant studio in 3 years or so!
Some ideas to get you going. Google for the names I provided.
