When I started running X-Plane during the v8 days, I used AMD CPUs and continued to do so until about 10.20 when I switched to Intel. Yes, you can overclock an AMD to within an inch of its life, but per clock cycle the Intel still gets more done. I'm also a software developer (real-time financial analysis) and know the importance of running a number of demanding and mission critical applications as millions of $ of client funds are at stake. I'll never use an AMD again.