Best hard drive health monitoring app?

[whitedragon101]

Someone recently told me on another thread they use "Disk Radar" to monitor hard drive health.

Is this the best app for this or are there any other contenders for the crown?

 

[celticpride678]

This one is good: http://www.volitans-software.com/smart_utility.php

 

[ECUpirate44]

Onyx is a good one.

 

[SteinMaster]

I use Onyx and SMART Utility