Currently we have been using PayPal for just under one year.
But now we're considering other types of hosting we are also wanting to use other e-mails.
Would it be possible to have say two or three e-mails, but have a different one as your primary email?
So like this:

email1@com.com - primary
email2@com.com - not primary
email3@com.com - not primary
email4@com.com - not primary

But have them e-mail say email3@com.com, would the money STILL go through or not?
Thanks!

set up 4 paypal accounts all going to the same bank account.

You can only have one Personal and one Premier/Business PayPal account, and you are allowed up to eight (8) email addresses per account. A payment sent to a non-primary account will still go to your account. However, the email address listed for the account will be the primary address.

AutomateHost has the better answer.

I have one PayPal account with around four e-mail addresses. They all work just fine, and I've never had any problems with the system.