If you are already using Quickbooks and do not want to migrate over to a new system, DesignerLogic can accommodate you.

Utilize the industry's most intuitive project management software and accounting's most ubiquitous. You can do this by exporting Proposals, Invoices, POs, and Time Billing directly into Quickbooks.

Avoid double-entering data.

DesignerLogic uses a third-party software  package (purchased separately at a price of $199) to handle this. Once the fields are mapped the import process is a matter of a few button clicks.

Avoid the awkwardness of Quickbooks for project management but do all your financials there.