I recently installed Sidux on my box for the reasons stated above. Debian Stable had snappiness but wasn't that advanced. Ubuntu Intrepid Ibex is advanced but is not snappy.
I have been ultra busy lately, trying to aggresively lease out 2 commercial spaces. That explains my thirst for computer responsiveness.
In mission critical scenarios, the PC must be ready to do what I need it to do before I know what it needs to do.
Sadly, I haven't found a distro that meets my speed requirements. Sidux is fast, but not yet as fast as XP on the same box. In any distro, switching tabs on firefox is a 0.71 second affair. 0.38 seconds away from my intended speed of 0.33 seconds. Whether you like it or not, I will say that I can switch between 3 tabs in 1 second on XP.
Waiting for 0.71 seconds to a second to switch between tabs on firefox/iceweasel is damningly unacceptable.
For now, that performance would have to do. That'll do pig, that'll do.
For some reason, Synaptic isn't preferred on a Sidux box. Unacceptable.
Video / Movie Playback
I didn't really know what I did but movie playback is awesome. I might have installed some proprietary codecs, but it feels as if they were part of the distro - I could be terribly wrong with this assumption.
Apt-get is the preferred package management system so more apt-get install foo stuff here.
Overall, Sidux's ease of use dannybuntu rating is on a level headed 6.34 of 10.
Darn it I am so sleepy my head is tilting without my consent.