Reopening my old thread a bit, got a couple of nice new bats (still haven't spent more than £200 on a bat though) and picked up a number of older ebay pieces. Some of these vintage bats (and I might iterate, only some) seem to still be in good nick and look to have plenty of willow for their weight, so it will be interesting to take them into a net session and find out how they compare against newer lumps of wood.
The ones that seem to have retained their "ping" are a Dynadrive, a Slaz V500, an SS Turbo Supreme (non-laminated), the GN Ultimate, GM Diamond and the Hunts County reflex. I suspect in club cricket that most of these would still be considered excellent bats and indeed, are probably used around the country in many places...
I'm still up for a T20 day, where in the first game, all batsmen must use vintage bats and retire at 25, and in the second, use modern bats, and retire at 25. I think That's be an interesting exercise!