Well, I found out that gmail now has "POP RETRIEVE" so it actually acts as outlook itself. So I gave my pop info to gmail, and now gmail is picking up e-mail every 5-10 minutes.
On the other hand, I told my Outlook to keep mails on the server after retrieving them for 1 day. During which I can still get all the e-mails on my Blackberry and also Gmail can keep a copy.
I regularly delete e-mails from Blackberry, but any given time I can use gmail mobile and search for e-mails like an archive and still be able to forward to myself or actually use that account to reply.. It was that easy.