Are you wanting to main a “demon hunter” or a “Havoc demon hunter”. Would be my first question. If the first than that tank spec is a godsend for being able to find groups.
If not than both demon hunters and rogues are fast gameplay. The mobility of a demon hunter as well as the wings are their major selling factor, while the rogue has stealth and doesn’t need to engage at all with tiresome mobs.
You could always check out the new hero talents to see which is more interesting. As well as the tmog, I think Tww rogue looks great in the ethereal looking set.
All Season 1 War Within Tier Set Models Now in Wowhead Dressing Room - Wowhead News