Describe your business a little more, this description is a little vague - what exactly does your company do? Is it a local or international business? Do you sell online? There are lots of cool names waiting to be picked, believe me
Just search a domain that fits your requirements. Use your main keywords, business name, etc, and mix them to find the best combination. You are the only one who can choose, nobody else can help you with this.
If the purpose of the second domain is to open your already functioning website, then why not get different extensions for the same domain name - ex. .net, .biz or something country-specific depending on your desired reach