Germany has good value but there are a number of issues with hosting overseas. Latency is one - in Australia one of the cheapest hosting companies is based in Perth but the latency is double that of Melbourne, Sydney or Brisbane.
The other consideration is the legals. Moving the server to Germany not only puts your data under EU/German jurisdiction in addition to AU, the new privacy laws to take effect next year will mean disclosing to your clients and they to their clients that personal data is stored outside of Australia.