PC

Unless you build PC once a year, otherwise there is no way you are going to know what the latest and greatest processor, MB, peripherals are.  It's a rather steep learning curve.  The last time I built my PC was in February 2002, and I am telling you, NONE of the equipment fails (touch wood, keep my fingers crossed).  I think it's just about time to get myself a souped up desktop in preparation for all the processing power I need to suck out and process 16MP pictures and 1080P video.