I always vote only for primedice when it comes to dice sites (due to them being the most trusted on imho), but this time i
must also mention bitdice, because they sure do have the best user interface - which is refreshing to see amung all the other dice sites that look like clones of one another..
PrimeDice has no invest feature that I can see, meaning it's just making a single person very rich.
My vote goes to Just-Dice and bitdice.me
... meaning it's going both ways is what it is. Being the owner doesn't only mean profits you know..
cheers