If you're looking to test the waters, Miroslav Philharmonik CE is a pretty good symphonic library on sale for $39.99.
Miroslav Philharmonik 2 CE Besides its own player, it can be hosted in SampleTank 4 CS which is free and includes other libraries.
Upgrades and crossgrade sales abound in the world of IK including to the full version of Miroslav Philharmonik 2, SampleTank Max (which includes MP2) and many other titles. It's hard to keep track of everything I own but once you get started, it's not that expensive if you shop carefully. My wife's favorite piano VI is the Alan Parsons Imperial (Mark Knopfler's Bösendorfer 290 sampled by Mr. Parsons)—$79.95 by itself but included in most bundles.
Unlike the Kontakt/Kontakt Player where one is paid and the other free but doesn't play everything, SampleTank 4 is the exact same player whether you get CS for free or spring for TS Max 3.5.
IK Max BF Sale To give you an idea of the confusion, the sale price for TS Max 3.5 is $599. It's $399 if you own a product worth $99 or more. The list on MP 2 CE is $149 but it's on sale for $40. $449 gets you a
lot of titles.
Don't get me wrong. I also have Komplete Special Edition (nearly everything) plus a lot of UVI and other VIs. I use what I need when I need it and it took me a long time to get here.