Yep the re040's are very bad for grip in the wet. I've had them almost exclusively on my zed. However, if you know that the back end is going to go on every corner/junction, then you can prevent it very easily. In that respect i like them as i know where the edge of grip is.
I had the falkens on for a brief period, and there appeared to be almost infinite grip... but im not sure if i liked that or not as i wasnt sure where the edge of grip was, and i felt that when i went over that edge, it would be too difficult to recover.
...so basically, expect that you are going to lose grip and adjust your style to suit.