I know you're used to Outlook, but I think gmail is good by itself. Try to get accustomed to it if you can. From my gmail account, I control about 4 other emails of mine, I'm able to send as if I was using my other accounts, got filters in place so that emails go to their respective folder and labeled properly so I know right away from what email it's arriving and on who is sending the email. I have filters that skip the inbox so I don't have to move them, but appear directly in their organized folders (of course, it lets me know I have unread messages).

You'll solve the spam problem and can manually force gmail to check your other inboxes on the spot, so many of the problems Buff mentions will be solved.