I plan to install that big bumper guard and with that on I think the stock grill will just have too much chrome up front so I'll get the replacement grill so it looks like this picture. Otherwise I'd stay with the stock grill.
I have to say I really like the "optional" grill replacement. If you want to see what the vehicle looks with the original grill verses the "optional" grill use the honda configuration right off honda.com. It kind of gives you an idea...personally it the replacement grill makes it look more truck like.
I love the optional grill, but it is only a dealer install and more than likely will stay that way for both Honda and the dealers sake. The grill is a bit expensive at around $500 plus labor....Not sure how much dealers in other areas are charging to install it. I got my installed with a package of accessories and bargained a total labor cost for everything together, which saved me around $600!