The next must have for Trapp Tacks is Sylenth1. The Sylenth1 is as reliable as a Gloc 23. The library's available via Torrent and by pay sites are a must to get the most out of it. Also I double up in my vst host rack to get an even deeper original sound. http://www.lennardigital.com/modules/sylenth1/
The clear cut champ in my book samples are top notch. The search engine and browser layout is google like with tags. One of the first that allows you to type not only the type of instrument but even a characteristics. Omnisphere then tacks it a step further allowing you to layer up to 8 complex sounds and adjust them with an internal mixer & effects. You will need horse power on your system though it is worth it. http://www.spectrasonics.net/products/omnisphere.php