x58 question

two questions i guess

the first of which being what is the difference between these two x58 boards?

http://www.newegg.com/Product/Product.aspx?Item=N82E16813188039

http://www.newegg.com/Product/Product.aspx?Item=N82E16813188046


second question. is there a different board i should buy over one of these two to use with an i7 920

The AR/A1 is the full retail box, includes all cables and brackets, and comes with a lifetime warranty upon registration. The TR/T1 is the light version, does not include all brackets, manual comes on CD, has only the essential cables, and comes with a 2 year warranty.

depends on your needs realy, if your not ocing you should look at the Gigabyte X53-DS3R. with the newest bios it supports SLI, as gigabyte has a SLI branded version now to. the boards are exactly the same only difference is the SLI one showed up about a month ago. on newegg the price difference is $15ish, for the extra $ you get the sli bios already on it. why pay extra $15ish for that?