forgot to mention that after posting I carried on researching and was recommended a Canon PIXMA Pro9000 -it has this feature:

The printer features a built-in flat paper path. This enables thick photo and fine art media to be fed straight into the printer without the risk of bending or curling. It also delivers exceptional accuracy when printing fine details.

However it costs about £400, not sure whether to try that or the epson, hey ho, will let you know what i decide - thanks again,

Ludmilla