Thanks everyone !
I tried contacting Graphtec, left messages , sent e-mails etc and haven't heard anything in over a week. E-mailed Summa and within an hour a had a 'phone call from someone, talked me through the available options even mentioned that he would get a sample of the materials we use so they can play with it and work out our best option. I'd actually like to speak to someone at Graphtec !!
Someone mentioned the Graphtec having trouble finding the reg marks and I have heard this before.
I hadn't looked at the Rolands to be honest & yes we do use Versaworks.
SUMMA for Sure. I know of a buddy selling an older D series if you are interested PM me and I'll shoot you his info.