@Mugunda,
I have used an Iphone,BlackBerry & Nokia smartphones.Iphone is simply a cool phone and works well for entertainment biased people.It's also expensive.Blackberry Bold is a serious communication machine.With the blackberry service that you will pay to the service provider, you will get your email on the go and its also much much easier to compose replies etc using Blackberry.Its also expensive.... are you willing to fork out extra cash for emails you might not need immediately?
Nokia.....Nokia is coming up and their prices are friendlier.Try the e52 or e75 and you are good.With the correct configurations you can get push email through POP3/IMAP just like the rest but for free....only that your phone will have many look alike China fakes and people wont "recognize" yours.
If u are a business kinda person with no fun side,do Blackberry.If you are into looks and fun(audio/visual) get an Iphone. If you want both worlds with a little less specialization at a friendly price, get Nokia.
Formally employed people often live their employers' dream & forget about their own.