Martin,
Out of the box, match up the profile with the material you are using. We all have our preference for materials, banner, cheap digital, flat panels and cast.
I suggest that once you select the materials download the ICC profiles from the media web site.
I use Metamark MD3 (Cheap) MD5 and Avery MPI 2000 (van printing - flat) and Mactac Bubblefree cast. I use the suppliers ICC profiles with very good results.
Hope this helps.
Neil