I agree with Force, don't listen to the hype.
A good bolt-on has as much sustain as, or even more so, than a neck-thru. Why? A bolt-on guitar (with a tight neck pocket) has direct wood-to-wood contact between the neck and the body. On a set neck and neck-thru, glue comes into play, and glue is a deterrent of vibration.
I prefer neck-thru guitars mostly for the feel of the heel. They just seem right to me.
Summary: a guitar's construction method shouldn't come in between you and the guitar you like!
Leave no stone unturned until I'm done.