I think both are ok because renting, you get to try out the game and if you like it, buy it! buying you get keep forever so im guessing they are booth great.
There is a thread on page 9 or 10 i think*scratch**scratch* with the same purpose as this thread. The other thread hasnt been [necro'd] yet, so you might as well have posted there and brought that thread back.
I think that you should do both. Rent the game to see if you like it, but then buy the game to support the developers because the if they don't make money, they won't make games.
