I bought my wife a Mac Pro 4.1 earlier in the year and I'm now looking to buy one for myself. I have had a look at what's available online and I can't decide whether to get the 2.66GHz model or pay an extra £70 for the 2.93GHz model. I am a web developer so will be using the computer for graphics and web related work. Which should I get? I am also considering a Mac Mini instead but undecided.