Go with 5850. It's better go with 1 powerful card. Also, an 870 mobo is horrible for crossfiring, since it's 16x/4x. I would replace the mobo with a Gigabyte GA-790XTA-UD4. Better mobo imo. Also, if you can, upgrade the CPU up to a 955 if you have the extra $20. You can drop the 5850 to a Gigabyte 5850, which is only $300, which will give you and extra $50 to upgrade to a 955.
I wouldn't recommend the 775 build. The sockets dead. But there are still a lot of people that use it, and it's not bad.
As for the pictures, you put the same picture up for the 1st and 2nd one.