I may have overlooked it but I dont believe you specified which program/DAW you use? That would really be the basis of this if you dont already have one. (Ill assume you do though for now) I dont really know any instrument effects that DONT come with articulations and what not. But my own personal suggestion would be "Miroslav Philharmonik" Alot of people give it a bad write up but from my experience its more than capable! The only thing is the Glissandos, sound clearly fake. But the rest i absolutely love. Its a really old program by now so im sure its going for cheap! (As for DAWS, My personal preference is protools 10, but there are many alternatives.) ps. Your comp specs seem easily capable of running most instrument effects ive seen. Happy Hunting!