Oh, sorry, I forgot to post this earlier!
Collage Video is a great website which provides the opportunity to view a minute of all their available videos. Additionally, they personally try out each video and then review it and break it down by content within timelines. Also, you can see lots of reviews by others who've used them, and the folks who review them are usually familiar with the genre and write really informed and informative reviews! I wouldn't say their prices are the greatest, so I check out the video there and then froogle it for the best price. That said, if the price is pretty close, I go ahead and get it from them so I'm supporting their business. They're great -- check it out!