I have a small school of 9 in my 29 gal. You are right - they are a great little fish - very quick to the food in my tank and if the others are not watching they may miss a meal. Mine do not school tightly but they do school. Never seen any agression with them toward one another but they do think that the pristellas should mind there own business.
Your pictures are very nice and show the silver tip tetra is worth considering for the community tank!
Awww, thanks Alaska! ) Glad to see there are others who have these great little guys. They have survived the night, and are so far, exploring every inch of my tank. I can't stop watching them...I just can't get over those colors.