HP Pavilion DV6-2170US is better than the other one.
Sure its some $150-200 more but you get some very useful advantages like 500 GB vs 320 of storage, upto 8 hours of battery life compared to 4 hours in the other one
15.6''vs 14.1" in the other one
And it adds Intel HD Graphics with up to 1696MB Total Available Graphics Memory
which is to some extent very useful
I agree that the 2170 is better, but the "Intel HD graphics" is hardly a selling point. Although the new ones on the i5 systems are better than they used to be, they're still near the bottom of the heap.