Ask for suggestions for hardware to use. You should use this tag in questions asking for advice relative to hardware compatibility and preferences.
You want to buy a new piece of hardware, but don't know what will work nicely with your shiny new Ubuntu install?
Shopping recommendations are mostly offtopic here (although it might be on-topic in HardwareRecs.SE), however you can follow this guide to ensure that your question is more focused:
When asking questions on this topic be sure to be as specific as possible in your needs to avoid your question receiving general opinion-based instead of factual answers backed up by user experience.