You're taking a big step in your business by separating your personal spending from your company purchases. A business credit card makes record keeping so much easier, while offering you and your family extra protection against business-related legal action. I can recommend a few places to look for reasonable terms on corporate credit.
Before applying for a business credit card, make sure your company's set up with a profile at Dun & Bradstreet. Although D&B will try to sell you a variety of products and services, setting up a basic DUNS number is free. It's the primary way that B2B lenders will track your corporate credit, and many small business owners neglect to get a DUNS file started until later in their growth cycle.
If you've only been in business for a short time, you may have to settle for a "professional" card. That's a small business credit card backed by a personal guarantee. It means that you're liable for any unpaid balance if your company fails to pay its debt.
A few business credit card issuers cater to start-up companies like yours, even without a DUNS number. Capital One, Discover and Bank of America all offer products that can help serve your budding business.
Once you've managed a card from one of these issuers for about a year, you'll probably start getting offers for even better deals such as one of the business cards from Chase. In the meantime, funnel as many of your company purchases as possible through your card, so you can establish a sound credit history.