Which WoW class/spec has the best mobility for questing and solo'ing low level dungeons

I want to raise a character to do quests and running low level dungeons for achievements. With lvl90 stats, DPS and survival are generally not issues, hence mobility has paramount importance for efficiency.

Based on my observation, some possible candidates are

• WW Monk, with Roll and Flying Serpent Kick.

• Feral druid, in Cat Form with Dash and Stampede Roar.

• Warlock, with Burning Rush.

• Rogue. I've generally seen them moving fast but haven't figured out what spell it is.

Some other possibilities, unlikely the fastest but I am not sure

• Priest, with Angelic Feather.

• Shaman, in Ghost Wolf form.

Since I haven't tried all of these classes myself, I'd like to know: in reality, which class/spec has the best mobility in the context mentioned earlier?

Rogues are the quickest. With enough haste you can have a 100% uptime on 'Burst of Speed' which is a 70% movement speed. Since it doesn't break stealth anymore, you can use it with nightstalker. Not to mention the passive 15% movement speed rogues already get + sprint.

To add onto that, if you want more energy regen to fan of knives while running, go subtlety.

1) Use marked for death on an enemy (gives 5 cp)

2) Use slice and dice (grants 4 energy/sec while up for subtletly)

3) Kill the monster you marked to get mark for death back off cooldown.

4) Rinse and repeat when slice and dice is about to fall off

Warriors are a really great choice for rushing through old instances and Raids. While they do not have the highest movementspeed they still have a high mobility (Charge, Jump etc) and what makes them really great is their ability to survive everything.

If you chose the Health regen below 35% HP you can literally pull whole dungeons and clear everything at once with Bladestorm or other AOE abilities.

The "Unkillable-Factor" Makes you faster since other classes often have to stop and heal or they don't have any heal at all which forces them to stay and reg or pull slowly.

When it comes to mobility you should always use your heroic leap, charge and intervene (banners usually) on cooldown while you can also pull groups with your ranged abilites.

Havoc Demon Hunters can outrun trash and murder all of it in 1 shot with their dash. High mastery, means even faster speed. Sure not 100% sprint, but your speed is faster than a feral druid or shaman in ghost wolf.