ORIGINAL: rockdawg
Are there any soft synths that can compare in sound quality to a real synth?
There are loads of soft-synths, free-, share- & payware, that have the same quality as hardware. If you're asking about 100% accurate emulations, I just take the word of the lads at Sound On Sound who have reviewed many of them over the past few years. More often than not, the comparisons have been close enough.
I tried the Edirol VSC that came with sonar three and wasn't very impressed.

Not surprised ! It's a basic GM sample player to be used mainly as a sketch pad or midi review system.
Unless you're a dyed-in-the-wool analogue-head with plenty of experience (in which case, you're gonna have to cough up $), take a few of the free, cheap & mid-range soft-synths for a spin. Check the KVR database if you hsave a few month to spare !
Accuracy of emulations doesn't bother me (no previous hardware experience), I'm just interested in how it sounds.