The factory supplied pates were huge, not only due to the legal requirements but the fact they were not yet my private plate of course. At a show, around the time I purchased my car, I saw a 570S which had some lovely shaped plates on it. The vendor's details were on the plate so I made a not of it and soon ordered up my own set to coincide with getting my plate moved onto it.
The company is FourDot and they have a wide selection of plates for all makes. There are a few styles for each model also, so you can get these and many other varieties from them.
I'm not a fan of getting randomly pulled over for no reason, so mine are 100% legal and thus far I've had no trouble.
I know loads of people don't run the front plates at all, and I agree it does look cleaner...
With my car being a daily driver I honestly just don't have the time for the grief of being pulled every week...