Accounting System

As a business owner, I'm looking to implement an accounting system that will help me with my bookkeeping needs. My current system involves using software, so the new accounting system should be able to seamlessly integrate with my existing architecture. I'm looking for a system that can handle my bookkeeping needs, as well as invoicing and payroll. I am open to integrating either QuickBooks, Xero or Sage but I'm also open to custom integration if that is the best way to meet my needs.