For your first choice I'm not quite sure if the proc would work cause is a Pentium D, Does that board support it? - maybe in the future I will change it for a better one that fits in but not right now.
Also, my GPU is an ATI card, so I don't know if it's wise to use a SLi oriented mobo
It seems that the Realtek chipset has compatibility issues (The only one that I've tried is the ALC662 -> this is included in your second choice and is not working properly with my build)
According to http://forums.ebuyer.com/showthread.php?t=40520
there are some integrated chipsets with better performance. What would you recommend me to do about this?