I like #2 & #4
#1. I like the perspective, but it could be better by levelling the image just a tad clockwise... It's ever so slightly off the horizon. Also just a tad more light on the body of the guitar to cue us as to what it is would make it more effective.
#3. Again, just a kiss more light on the body.
#5. Love the specular highlight, but the darkness on the rest of the chrome suggest to me that the photo is underexposed.
Overall, though, I'm not really digging the purple tint.