Hey Buddy,
 
I also want to buy best orchestral vst. But can you hear about orchestral plugins? 
 
I read many blogs about it at @bestorchestralvst.com and after that I having confusion. Can you recommend me, which is best orchestral vst or orchestral plugins. You tried this and please suggest me best. Thanks. 

Well, the CHEAPEST way to get  a TON of worthy Orchestral Instruments
is to subscribe to East West Composer Cloud X at $24.99 a month.
You'll get Piano's Gold, Orchestra Gold, Hollywood Orchestra Gold, 
Choirs Gold, and a TON of others.  If you don't want to commit to a year,
it's $29.99 for a month.  It's a great way to TRY THEM ALL out to see if they'll do
what you're looking for.

Just a note if you have Kontakt you can find all kinds of pretty cool low cost and free instruments...
 
A lot here mixed with non-kontakt
http://vi-control.net/community/threads/important-all-vi-freebie-contributions-here.27876/page-9
 
A bit out dated as the lazy bum who runs the place hasn't updated for a while
https://bigcatlists.blogspot.com/
 
And a couple instruments I've made across the years...
http://bigcatinstruments.blogspot.com/2014/08/gm-midi-instruments-for-kontakt.html