Hi Renny, nice to see you around again!

About A8, I would strongly recommend you to do not waste your money by buying a8. You better switch to another engine (there are actually bunch of them and you'll be able to start for free), cause Acknex is completely dead now. If you just want to toy around with Acknex, A7 is still good for that, but I really see no reason for you to waste your money and your time by using it, if you are planning to create anything. Just my two cents.

I'm personally switching over to another engine too, probably unity 5. There is no reason to ride a dead horse.

Best regards!