Matching Rear wheel and front rotors will give you the wow factor your looking for. If rear wheel is not in budget you may want to consider lowering the rear, adding some stretched bags and getting matching front rotors. I personally like the stock front fender, but understand why many people decide on the wrap units.
So now that I see it on the bike I'm just not sure how I feel about it. Looks better than stock but doesn't give me the wow factor
What kinda WOW factor where you after? Most of the custom bikes have much more than just a single wheel change and its the overall final package that completes it. IMHO you made a good choice on the wheel and as others have said the matching rotors will make an improvement.
you may want to look into getting 1 of those Klockwerks tire hugger fenders. It will hug the wheel closer and show off the 21" a little better. Honestly your bike doesn't look bad but something seems off about it? Not sure if it's the stock rotors or the stock bags or something else??
heres pic of mine with 21 front and klockwerks hugger fender I had the bicycle fender didn't like. New one has the right look