Yes, it's the slowest but it's actually the best on the market for photorealistic images. I use it only when i really need. No crash here, it's really stable... This is an image made for a client, as you can see is enough good. The original is 2000x2000 pixel.

For upgrading... I've received an email from DAZ. No possibility from C4 pro. I've bought every version of Carrara since metacreations days and now i'm out because i havent bought C5...

-TOXE