@ sullysnet
Tryed different dual kits on my board. When going for Dominators check revisions, different ones could cause trouble (even same SPD's).
For your purpose I'd go for Micron Chips, D9GMH or D9GKX, even not listed in vendors QVL, MB will start with initial release BIOS all slots populated.
Depends as well a bit to your location and RMA regulations.
The only vendor I know granting chips is CellShock (preselected Microns, I've tested 30 passes Memtest 86+, no failure), but if you like orange heatspreaders, go for Crucial and check it out.