I picked Scryers because of three things:
1. I got sick of dying when I didn't quite make the elevator. Now that I have a flying mount, it doesn't matter.
2. The Scryers have an enchanting trainer on their tier (but no reputation formulas). Now that I'm 375 enchanting, it doesn't matter.
3. There isn't a huge, game-breaking different between the exalted inscriptions. At a T5 level, there is a <1 DPS difference between the two. So that doesn't matter.
The only thing that really matters at this point is the fact that the Shattered Sun Pendant of Might is DAMN good as Aldor, and mediocre at best for Scryers.
So now that I'm exalted with the Scryers, and I'd have to go out of my way to get Aldor rep, I'm stuck. Oh well. In a few months, when WotLK comes out, it won't matter a single bit.
My suggestion would be to set your hearth up with the Scryers but don't build ANY rep with them until you get your flying mount, and then switch to Aldor.