Question About HP H8-1040 & H8-1050 Desktops

Hello Everyone !

I'm a new member looking for advice.

I'm considering purchasing either the HP H8-1040 http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02...

Or, the HP H8-1050 Desktop PC http://h10025.www1.hp.com/ewfrf/wc/document?docname=c02...

-- Both systems are virtually identical, other than the video card. The H8-1050 uses the AMD Radeon HD 6850, and the H8-1040 uses the Nvidia GeForce GTX 550ti

-- Both systems use a 5400rpm Drive. Their lower end systems use a 7200rpm Drive. I'm surprised HP would use a slower drive on a high-end system. Should I worry about the slower hard drive speed ? Can anyone explain why there could be a reason for the slower hard drive ?

Here's my questions :

Based on the items above, would you choose the 1040 or the 1050 model ?

Is either of the 2 video cards above, a better option ?

Should I worry about the slower hard drive speed (5400rpm vs. 7200rpm) ?

The other option is to build it CTO via HP, though it will cost several hundred dollars more for the same configuration with a 7200rpm Drive. I know I can always replace the hard drive, but I'm not experienced with upgrading desktops.

Any advice would be much appreciated. Thanks in advance !