Raid unit frames with debuff details...
 

I am a tank and the current UI I am using seems to be having some issues, so I have started looking for a new UI or a set of unit frames. The current ones I have show debuffs on raid members (for example Saurfang's debuff in ICC on the other tank) so as to cue taunts, etc. I have looked at X-Perl, but I could not get it to do this... any insight would be great...

Try grid... even if you arent a healer you can set it up to show you everything you want.

I switch my UI around plenty but as a tank when I need to see those items, I'm not looking at my raid frames, I'm looking at the target of my target which is always the tank I'm watching so I can taunt at the right time. This way I don't have to clutter up my raid frames too much. might work for you, might not :)