there's amazing music made with stock plugins where the composer/producer/musician learned everything about their chosen software and applied that knowledge.
there's ear-bleeding awful music made with high dollar plugins by guys that figured that buying them would somehow transform them into hit-makers.
The real question is this: Are you committed enough to your craft to learn everything there is to know about the synths and fx that are included with your chosen DAW as well as any others you happen to pick up along the way, or are you the type seeking a band-aid, something to fix your music because you lack the skill or dedication necessary to turn out listen-able music?
"... got a problem with your processor? your gonna have to call pentium for that." - joey tunez