Can anyone help. I have an AMD 4000+ which runs at 2.6 on air. I am looking to take the next step and am wondering if an Opteron 148 (running at 2.8/3.0) will be worth it. I am only looking to spend say £200 on a new CPU. Should I wait and save some more dosh? Would one of the oter Opterons be worth looking at?