PM can be great pieces for dios, just ask VIOLENTFIX . he has used them a lot(see cobratheinnersanctom.com). the best pieces all depend on what you need. there are a few things to look for #7224 office equipment, for an office set-up desk, computer bookcase plant etc
#7837 container, 2 lg shipping container great for backgrounds
#7333 scaffolding
#7867 potable bathroom
#3176 fire station command center, good computer console
# 7682 operating room, for doc and lifeline
computers, telephones and tools are always a good for dios

i believe all for mention sets have been used in dios or pic seen here at Joedios
also look up playmobil.com to see what they have.

hope this helps