Neo,
The DML figures there are ideal for what you're thinking of doing. Also, the DML 2nd Rangers figures (may be out of production) are perfect for D Day as well. The Tamiya figs you've got posted there are older and not very accurate lumps of plastic that somewhat resemble WWII infantrymen. They came out with a better set a few years ago, but those are somewhat underscale.
The basic D Day uniform consisted of the M-41 field jacket, M-37 wool field pants and wool shirt. Boots were low-quarters with M-1938 leggings worn over them. That's the basic issue. Web gear varied a bit, but was basically an M-1923 cartridge belt or M-1936 pistol belt. Attached to that could either be M-1936 combat suspenders and an M-1936 musette bag or an M-1928 haversack, which had its own integral suspenders.
If you've got any specific uniform or gear questions, drop me a line.