A new machine would be fine for anybody, but that model of a mac runs just fine. I run a studio off of a 2008 model mac pro running Logic 9/X and it churns out quality work, gives me next to no downtime, and doesn't tend to impede my productivity. I don't have that much headaches with it at all. Some of the newer computers would obviously run things even faster, but if your goal is to make some quality music/audio, that is: for the time being, a pretty solid setup. You can always max out the ram or put a DIY processor upgrade into it since it's past the warrantee and it'll be a good computer at least for a few years (unless Apple cuts off support artificially for it of course). If you have an extra $4,000 to burn, then just get a brand new Mac pro but there's nothing wrong with the 2008 Mac Pro for the time being.