I am not bashing your guitar I had one myself. As you delve more into tone you will pick up tonal charactatistics or qualities that you may have either overlooked or not noticed in the past. When that time comes you will probally want a "higher quality" or basically more pricy guitar. A great guitar doesnt have to cost a fortune I only have yet to play an Ibanez that I truly loved. I am a Fender (and Martin) man and my next guitar will be a les paul studio or custom.
p.s also your gear as in stomp boxes can durastically improve your tone. You can probally get the tone you want without changing your pickups. You may simply need a good od pedal? Go to a music store and try a few overdrives and distortions maybe a line 6 pod? For the money the pod offers alot of versatility.