Hello all! I've used Raxco PerfectDisk for years (found better performance over Diskeeper and O&O), but I'm curious as to what our experts here think about System Mechanic? SM is supposed to optimize *programs* as well as just defrag (and actively prevent fragmentation like Raxco & DK). For "maintenance" I've been comfortable using TuneUp Utilities, but SM seems to do pretty much the same things. Thanks for any input!