I have a sony and that has a delay. I thought it was a fault, but if yours does it as well it must be a neccesary part of focus and light sensing before shutter action. whether a new model would be any better would only be answered by trying some out in jessops ( the only shop I know that lets you mess about with the goods ) I must admit it is off putting, you have just seen a candid shot, rush to take it, press the button and no.the camera says " lets wait til the actions over " and then "click clonk " . many a good photo lost.!
good luck.