Can anyone recommend an email client for Windows 8 which will support multiple email accounts but with the following features:
- A single inbox for mail sent to all accounts
- The ability to easily select a sender id/reply email address when a new email is being created, or when responding to an existing email?

I've tried using a separate Gmail account to bring the emails into a single inbox, but the Windows 8 mail app will only allow selection of an alternative sender id if I also add my other email accounts to it, and even then the process of changing the sender id is quite laborious - i.e. 2 additional clicks just to get to the option of selecting the "sender" account.