DVD search by features???
 

I have a clip of an Eric Clapton concert that was pretty darn good and was thinking about getting the entire DVD and it got me thinking,

Is there a store or search engine where you can search for DVD's by particular features of the DVD? For example I might be interested in Rock Concerts in 5.1. or maybe sci fi movies that are 16:9 w/6.1 surround.

I have seen some lists of like all "Superbit" but haven't found a mix/match type thing. Basically I guess I'm trying to find out what is available with no title, want the search by features.

Does that make sense?