I have to disagree about the old version of the rear try-all. It's heavy but still punctures, for the same weight (or lighter) you could get a conti rain king which can't be beaten for grip or stability.
If you are after lighter tyres, then yeah, the newer try-all lite is pretty sweet and so are single ply Maxxis high rollers, but they still don't have a patch on the Rain King for grip!