The Lutron plates are nice. But the switches use a regular Decora profile (which, I believe Lutron invented), so any wall plate designed for that will work just fine. Most of mine are currently regular wall plates. I do plan on replacing a few of them with the nicer ones from Lutron. I decided against this at the of construction as we were already well over budget on gizmos.
The other influencing factor is I have some Russound keypad nearby and wanted to avoid having them clash, decor-wise. However, the Russound Uno-S2 keypads fit quite neatly into a 2-gang decora opening if you remove the center section. I had done this in the old house for a room that had brass wall plates. Took a bit of careful work with a Dremel and hand files, but it looked great. I've just not gotten around to seeing about altering a Claro wallplate for the same effect.