Total: $620. The X4 955 is cheaper (by about $100 counting the board) thant he i5, has a better upgrade path in that it actually has one, and performs only slightly less (which doesn't really matter for gaming). The 460 is a lot more powerful than the 5770, and has an excellent upgrade path. It's literally the only nVidia card I'd recommend right now.
Second build by Mad is the better choice. You can not SLI the GTX 260 on that mobo, or any mobo with AMD chipset for that matter. You'd require a mobo with a Nvidia chipset, which will work, but is not supported by AMD if there are ever issue.