Alright Im looking for a disk defrager that will allow me to defrag as many system files as possible. Im currently using Puran. I love it, its light, fast, stable, and does a good job, but Im looking for something that does a defrag in a bit more depth and has more options on how the defrag should be done. Current contenders are O&O, PerfectDisc, Auslogics Disc Defrag, and Ultra Defrag (open source). Any others besides Diskeeper that should be considered? Id love open source, but some times open source doesnt beat paid software in terms of performance.