So I've been having issues running logic or having Firefox open with a bunch of tabs on my Mac Pro 2.93GHz Quad-Core Intel Xeon [March.2009]. I've also found that playing Starcraft 2 is waaaay nicer on a new iMac than it is on my computer. My question is, should I just try and sell this machine and get an iMac? Or upgrade the RAM to 12 GB (from its current 3GB) and maybe get a new graphics card? I also only have 14GB of hard drive space left, so maybe that's causing performance issues as well...?