Are you looking for a gaming notebook? Both will be very weak playing modern games.
For a general purpose and entertainment notebook I'd choose ACER/i5-430M/500GB HDD
over the MSI/i3-330M/320GB HDD
The first think, that i looking for a gaming notebook but my budget is less than $1000.
That why i confuse in choosing which notebook shall i buy.
Thanks for the advice.