I look for the shape first as that means they will fill the barrel better so better consitency at fos and less movement whilst in flight. The Fill has to be good consitency so it makes and leaves a mark, some people prefer brighter colours but as long as it leaves a good mark that should not deter you.
Price is one you with never win, everyone wants cheap paint but sometimes good paint comes at a cost.
Tigers have been training with powerball/sterling this year and this could be a big year for them. I have known them more for site paint than tourney, but there is nothing choose in shape between the whole range, it is perfectly round. So you know exactly where it's going to shot even if it is the lower range