@KatosAurion28 - I think rolling with your guitar would be fine. I definitely do NOT think you should go purchase a new instrument. You might get the elitist asshole here or there, but I don't think most people will notice the difference. Honestly, in the original version of FFIV, you can't tell very well what his sprite is holding, anyway!
Of course, my instinct is to nudge you to try your hand at new techniques....but that's only because I like seeing people try new things.
Your guitar will be just fine in either case!