I paid a lot of money for the Miroslav library a couple of years ago,
but there was
a package announced at Namm containing all sounds (8 Gb)
for under 300 GBP or 500
At the moment I find myself doing more and more with Sonic Implants.
They don't come cheap though ...
I ordered the Motu Symphonic Instrument
right now which set me back 290 €.
I can't comment on the sounds, handling, etc. of
course, it's brand new,
but the demos are promising.
An other alternative
I keep my eyes on is Synful:http://www.synful.com/
You can download a demo app..