I have never come close to getting a nice guitar sound. I have managed to get a passable plucked string sound though, but it always seems to static when compared to a real plucked string.
Capturing the playing nuances of a real Electric Guitar is pretty much impossible IMO. Some of the newer VSTis do a reasonable job, but an analogue modeling synth doesn't seem to cut it. That's probably why Romplers (and real Guitars)sell so well I guess.
At any rate though DS, I am looking forward to hearing what sounds you come up with.
Let us know when you have some ready!