The choice of the most suitable ERP (Enterprise Resource Planning) system for a Hong Kong business is influenced by a range of factors such as the business size, industry, specific needs, and budget. On the other hand, some of the well-known and most recommended ERP systems that are frequently used in Hong Kong and around the world include:
1. SAP ERP: Being a comprehensive software with high scalability, SAP is one of the top choices for big enterprises. It has a vast variety of modules that can be adjusted to fit in different industries.
2. Oracle NetSuite: A widely used cloud-based ERP software that is favored by mid-sized companies. It is made up of an all-in-one management suite, consisting of ERP/Financials, CRM, and e-commerce.
3. Microsoft Dynamics 365: This ERP solution is well-known for its flexible nature and the possibility of integration with other Microsoft products. Both small and large enterprises can use it.
4. Infor CloudSuite: Infor, besides providing industry-specific solutions, is known for ease of use and extensive analytics.
5. Odoo: An open-source ERP program that is very adjustable and cost-effective, which is why it is a hit with small to medium-sized businesses.
6. Epicor ERP: With a focus on manufacturing and distribution, Epicor is a good fit for companies in these areas.
7. Sage 300cloud: This is the new name for Sage ERP Accpac, which is a popular accounting and finance program for small to medium-sized enterprises.

While selecting an ERP system, you should put into consideration things like the unique necessities of your company, how much it needs to be customized, user-friendliness, and the overall expense of owning it. Also, talking to an ERP implementation partner or consultant in Hong Kong can be beneficial as well; they can offer you good advice and with their help you can achieve successful deployment.