Q: The built-in defrag is taking forever. Are there something better / more sophisticated?
A: I used to like Diskeeper Lite and UltraDefrag. Diskeeper Lite is too limiting as it will only do one volume at a time, and at times you need to repeat the defrag a few times, and you can't do it in the lite version except manually. UltraDefrag doesn't have many options.

I was just introduced to UltimateDefrag, and I prefer this one to the others.