Quote - Wouldn't Bryce 6.5 be a free download for the users of 6.1? Does the 6.5 manages better RAM? I have 4 gigs would that be enough to handle scenes on B6.1?

One would expect so but there has been talk of making it a payable upgrade. As for the specs of 6.5, your guess is as good as mine, Daz is keeping tight lipped about it.
I have 4gigs of ram and Bryce 6.1 runs fine on that.