WordNet sense 1 (of surpassing excellence):

superb

WordNet sense 2 (of high or superior quality or performance):

superior

WordNet sense 3 (having a tendency to reverberate or be repeatedly reflected):

ringing, reverberant

WordNet sense 4 (having or marked by unusual and impressive intelligence):

brainy, smart as a whip

WordNet sense 5 (having the capacity for thought and reason especially to a high degree):

intelligent

WordNet sense 6 (characterized by grandeur):

glorious, magnificent, splendid

WordNet sense 7 (making a strong or vivid impression):

impressive

WordNet sense 8 (having striking color):

vivid

WordNet sense 9 (having striking color):

colorful, colourful

WordNet sense 10 (emitting or reflecting light readily or in large amounts):

bright