i chose a mobo gigabyte GA-H61M-S2P-B3 .. i was about to buy 4gb ram (2x2gb) as it has only 2 ram lots i thought that for future upgrades i can't insert one more ram as the two slots will be filled by 2x2gb ram's..so i decided to get a single corsair 4gb 1333mhz ram ..does the dual channel memory is very important or a single channel memory is enough .. because currently most of the games use 4gb ram so after 2-3 years i can insert one more 4gb ram if i insert a single 4gb ram..is 4gb ram relly enough for gaming for 4 years from now..