I'm guessing you're referring to the Aluminums. I haven't used the newer Aluminums, but honestly from what I've seen of them they don't seem to be quite as good as the older 8100 series. Motor structure, suspension, etc. isn't quite as beefy as it used to be.
wat about the titaniums are those ne good? Whcih would b better 1 re x.xx 2, dd 3500 or 1 eclipse titatium wheen powered properly n a 3.55 inside volume cu ft box