Personally, I wouldn't like to see a CSI: UK as much as I love the series. We have other drama's, like Silent Witness etc, which are "generally" the same kind of thing, and those we are great at, so would rather they stuck to it.
Aren't CSI's actually members of the PD's in the US though, which is why some of them interview?? I can't see them have a successful series and franchise like they do, if the fundamental foundations of the show were complete nonsense?!