Frankly? This will do your HD. It has the chops and with the Nvidia 310 GPU some games will be playable.
http://www.amazon.com/Acer-TimelineX-AS4820T-3697-14-Inch-Aluminum/dp/B003LL2D0A shows the really nice i5 CPU (it's great stuff) but the Intel HD graphics means that HD should be fine 98% of the time (I will not discuss MKV or such playback) games may not be an option here.
Tough call but both should fun to own. For me I could use the Acer because of my needs, but each person needs to find the right fit.