i have a go pro black. and i can honestly say the go pro silver specs are thetoo simularto a
hero 2. so its not worth paying the money for one. the r7 is a nice shape for paintball compared to the go pro too.
my main reason for choosing the go pro was the fact i do a lot of different sports, wil also take it snorkling and diving. if you intend to use it for diff sports then the endless attachments and strong waterproof case will help. if just for p ball go for the r7.
with the options the go pros give you (pro tune for example) its a real video editors dream. i am still learni but it helps to be good at video editing software for this cam.
verdict: if you can push to get a black instead do it..as it comes with more accesseries and better specs.no point going for a sliver even it is slighty smaller then a hero2 its not worth the extra money. soo a hero 3 black or r7 it is
hope that helps.