The most prized ones appear to be Colored Teardrop maximas. Seems to be the hardest to find. Some might say a Blue Squamosa, too, but most of those go overseas. So, we don't see them a whole lot here.
A super-sized gigas brings a definite wow-factor to large tanks.
For a small SPS tank in your case, a lime green crocea would be the ultimate find. Unfortunately, those usually go overseas, too.