My thoughts exactly. Quickbooks works, the format is transferable to almost everything. You know the taxes will work out, and hell buying it itself is a business writeoff.
I am all about open source solutions for small offices, but do not skimp on your financial software. It will pay off much more in the long run.
The fact that quickbooks can handle everything from POS to inventory to payroll with no issues and little to no training, makes it a very obvious choice.