What is a payroll solution to use with Odoo? How would payroll get imported into the accounting module? there is value in having the ability to handle payroll within the system especially when dealing with commissions or pay based on timesheet.

Entering the payroll info in Odoo after the payroll is done corresponds to 1 journal entry per month. There is no point in spending thousands of dollars in integration to save the "struggle" of creating 1 journal entry per month. Your company will not be more efficient due to the fact that your accountant saved 10 minutes over a 1 month period.

Regarding the commission question, each company has their own rules and calculations when it comes to commissions. It's impossible to create a generic Odoo module that would cover every possible calculation, especially considering how creative certain companies can get in that aspect. One possibility is to use the Google Spreadsheet integration to pull Odoo data in a spreadsheet and have commissions calculated on the fly there. Example: https://youtu.be/P6lkB05Emuo?t=4m50s