Not even remotely a guitar player (and not always able to hire one) - RG 1.5 has been a good tool. This new edition looks even better. Hard to tell when it ships but you might find these demos interesting if you are after a good acoustic sound.
You would be surprise how fast you learn how to 'play' (keyswitches, splits, etc.) this instrument - strangely intuitive. Some very creative mapping and programing done here - IMHO. My guitar playing brother thinks it sucks though