2DAMFLASHY: i have had the Z64... for a long time and think i have gone to the pro shop everyday since the ATV came out ... but just will not pull the trigger and buy it...
I had the Z64 too, thought I'd never get rid of it, as I knew all the shots very well and didn't feel like learning a new club all over again. That's why I never got the 60yrd CG.
The ATV is better I think. The slower meter is not really an issue, but it has a LOT more spin. So with full shots you'll only ever need a touch of bs, if at all. I like pitching with full bs, cause the distance is 14yrds and with the spin, it will almost stop dead at 14 yrds. The flops are almost the same, (except you get 16yrds with the ATV)
In my opinion, I think it's worth the switch, if you've been using the satins already.
Hope this helps.