I am a long time user of Signlab. I am using 7.1 and I don't see much cause for upgrading to 8. Signlab 7.1 can support pulg-ins also!
This programme is wonderfull for making and designing
signs.
But (and here is a big BUT) I would never ever use it to run a wide format printer.
We have struggled on for years trying to match colours or even just to get it to look like what's on the screen with no luck.
Recently upgraded all the machinery got a big valuejet and using wasatch RIP.
Strangley all our problems when using printer have gone and can only put it down to the RIP in signlab.
There are too many things the end user can alter. I like most people just want it too look something similair. You cannot colour match with a cmyk printer! You can simulate colours but they will always be only your best guess.
Sean