There will be no bottleneck, just I'd expect that after some time- lets say, 1 or 2 years- some games will need faster CPU just to run, and some will require more than 320mb video memory. However, till that time, you will be able to enjoy good framerates at really nice graphics quality.
And that CPU is easily overclockable, it shoul be very easy to make it run at 2.3 or 2.4GHz