If you are looking for some great sound effects that you can actually use look no further than Designer Sound FX. This is a great product from Andrew Kramer of videocopilot.net. He as many useful products that I can't live without and this in no exception. There is too much here to list but here is a quick rundown of what you will receive:

•  500 Sound FX & Audio Elements
•  Royalty Free Sound FX for all your productions
•  After Effects Project File for this Promo
•  Free Tutorials and Extras!
•   2-DVD Set jammed full of extras!

Bonus Extras & Tutorials:
5 Video Tutorials: Learn to Plan, Mix, Score, Animate, Sync and Render
Learn how to create audio scores like the one above using Designer SFX

 5 Pre-Scored Audio Tracks with AE Project Files (Royalty Free, AE 6.5+)
Use, Rearrange, and learn from these 5 pre-made scores or design your own

  Entire Promo Video Project File & Footage (AE 7)
See how everything was created and manipulated from start to finish.