My oppinion: There is no better software on an A500+ than Deluxe Paint. Maybe you could argue which version (I loved II and III).
When it comes to dry office work the A500 is not the best choice. You can create fancy presentations in eg. AmigaVision or Scala. But spreadsheeds and wordprocessing ... that's a bit difficult. What do you want the Wordprocessor for? Maybe use Latex or a seaoned DTP-program? AmiWrite is the wordprocessor of my choice on that platform. Some people like Prowrite, there is a lot out there, but the functions usually don't rival MS Word in any way.
I have seen a couple of spreadsheets on the Amiga, but they usually don't live up to the potential the machine. Perhaps you don't really need a spreadsheet and are happy to create your tables with Superbase?
