That is a pretty neat setup you have so far! The MSI gaming 5 does support SLI and Crossfire where the gaming 3 does not, also the over clocking for the gaming 5 is much better but since you can't overclock, you won't use it unless you decide to upgrade your CPU at a later stage (always good to have extra features) and for $30 more (checked on newegg) the winner in my opinion is the gaming 5, both motherboards does have the red in it, but if it is not enough you can always put in a red LED fan