I'm a big fan of the straight factory grips, all of my 3rd gens wear them. In fact, my 5906 is identical to yours on the far right but with the straight factory grips.
Give those a shot if you're able, the grips can be had fairly cheap at gun shows and I find them way more comfortable than the rounded ones. The hogues are comfortable, but too big for the size of the gun in my opinion.
Keep on rockin' the 3rd gens!