Hey up. I had the same quandary a couple of years back. Bought an EX8 and thought the ride was superb – the full-floater and ABP did seem to make the ride feel very different and really nice… BUT…
After a few rides at Dalby, a couple of short adventure races and a lot of bimbling round my local trails, I decided to swap for a Top Fuel 8 – kindly assisted by someone on here.
Basically to me, the extra inch of travel didn't seem to be helping my descending any, but the extra pound or two in weight did hinder me on the climbs. The lighter bike seems a lot better on the ups and I still keep up with friends on longer travel bikes on the downs.
The new Top Fuel, with the ABP and Full-float should ride superbly, if my experiences of the older bike and the EX are anything to go by. And the EX isn't exactly a heavyweight, but it was an important consideration for me.
Hope any of that helps!
Pyro