I think you misunderstood my intent. I did not intend to come across as a guitarist/snob, nor am I a synth hater. I enjoy listening to synth music, and even own a couple of those spawn of the Devil things, (just kidding!) myself.
Although I DO think synthetic music has it's limits. Certainly, producing a computer that would 1. Take about as much room as a guitar and/or amp, 2. Either take LOADS of programming time or be only an approximation of a guitarist playing a real guitar, and 3. might sound something like a guitarist playing a real guitar, would have very limited appeal on the open market and would be a BEAR to figure out how to play, is way past that line. Again, why spend the money, time and trouble to get there, when there are plenty of good guitarist who have spent a lifetime learning all the subtilties and intricaties of their instrument (and there are tens of thousands, perhaps millions, of different combinations) who would be happy to provide you the sound you seek? You could either spend a mint buying such a synth, then your own lifetime learning it, or you could simply hire a good session guitarist and be done with it.
And even if you are only interested in a relatively simple program, your time would be better spent (both from a time-spent perspective and a good-sounding results one) just learning how to play the solo you want ON A FREAKING GUITAR. Even for single notes, things as arcane and subtle as the kind of wood the fret board is made of have an effect on the tone (this because a guitarist stops the strings between his fingers and the fret board.) NO one is EVER going to mistake your synth playing for guitar.
My post is not about snobbery, or even perserving jobs for guitarist. It is about the most cost- and time-efficient way to get where you want to go. And the reasons true guitar sound from a synth will probably never happen apply to ALL other mature, "natural" instruments. After decades of development, even the best piano synth is no match for a middle-of-the-road acoustic piano; the best orchaestral synth is no match for a real orcestra. They may come close, but there are leigons of listeners who can spot a fake within two bars.
Would a supposed "real guitar synth" sell? Oh, sure, it would at first, to a few loaded (perhaps in more ways than one!) early adopters. But after a short while, the new would wear off and everyone would see that, 'tis true, the Emperor has no clothes. Guitarist are not immune to this- hybrid amps (with a tube pre-amp and a solid state power amp) were once "the buzz" among us- now we realize we were pretty much duped. Geech, if it can't fly with just ONE of the gad-zillions of factors, how the heck do you think there is enough time between now and the end of the universe to sort ALL of them out?
Really, I am not trying to "attack" you- just trying to be realistic. Have fun with your project, but surely you didn't expect to post such a thing and not have someone nail you?
EDIT: If your project is to see what you can do with synths ONLY, I can understand and respect that- such a goal has merit, insofar as it could help you develop your chops. But if, say, your drums are even electronic drums, played by a human drummer, I don't see the point in trying to "synth" the guitar.