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Honestly, the best one for the money right now in MY opinion is this one.http://www.amazon.com/gp/product/B000YADEOKits on sale right now and a very nice camera.takes great pics.you can see mine in here a ton.
I believe the 30 seconds is not the delay time? It is the recovery time. (The time it takes to process the information after it takes a picture untill the camera is able to take another picture.) It use to be one minute. Althou trail cameras are able to take pictures in a burst mode.(2 or 3 pictures one right after another)Here is a site for Trail Camera reveiws. Do some reading here and then decide.http://www.chasingame.com/