I've looked at upgrading from P10 as some of my scenes are getting big and a couple of times I've had P10 fall over without of memory issues. This has happened when rendering at times too. I've got round it by saving my scene, deleting some items, rendering it then reloading the original and deleting other bits and rendering again then assembling the lot in Photoshop. This is a chore. I've looked at the comparison chart on the Smith Micro site and it says P11 is 64 bit but the info P11 Pro says 64 bit native whereas the P11 info doesn't. So which is it? I'd prefer to go for the cheaper option as funds are tight.