I plan to buy samsung omnia pro mobile B7320 I want to know is this a good set, Does it support business card scanner, does it have a push mail.
over all view good and bad

Its a Windows mobile runing Microsoft Windiows Mobile 6.1

Can't say about Business Card Scanner but it gives a lot of features which a windows mobile has to offer. So, you can configure normal mail, push email etc. in it. Its a good entry level windows mobile with value for money.

Regarding it getting hanged.. well I can hang any windows mobile in matter of seconds, so it depends upon user how to use it. I own one of the fastest mobile processor mobile but it also stucks time to time and I know only bcz of pushing it to its limit.