Heh Heh. I just signed up my 5 shamen as aldor. I couldn't decide so I just said f it and went with the side I had the most turn-ins with.

As a side note, the inscriptions for the Aldor lean towards + spell damage while Scryer are more + crit. Also the sunwell rep neck has a bonus effect that is different depending on whether your exalted with aldor or scryer. From wowwiki:

"The Aldor proc is Light's Wrath, which grants +120 spell damage and healing for 10 seconds. The Scryers proc is Arcane Bolt, which is a bolt that causes 333-367 arcane damage with a chance to crit. The bolt is affected by spell critical strike, but not +spell damage and healing or spell hit."

I'd say the aldor one is better. But what do I know, I'm not close to being exalted with either faction.

Oh and Aldor rep turn ins usually auction for 10-25% more than scryer stuff.