MSI NX6600-VTD128E Diamond -
The real jewel in the crown for this board, assuming it is indicative of these boards as a whole, is overclockability. If the price is right, then this part could become something of a darling for those looking for a bargain in the mid-range video card sector - A board cheaper than a 6600GT but overclockable to beyond 6600GT clocks would be coveted much like the GeForce 6800GT has been at the high-end.
AOpen Aeolus 6600 GT -
This 6600 GT just like all the others has 128 MB's of DDR III memory, and the NV43 GPU. This card also features a maximum resolution of 2048 X 1536 at 85Hz. The NV43 GPU provides 8 pixel pipelines, and 128 bit graphics core. Basically a reference 6600 GT with a different color PCB and fancy looking HSF.