Hi, I am finding my 2007 imac to be quite sluggish when using LR4 and Photoshop. At the moment I use my imac with a NEC P221w monitor and spectraview II. I'm tempted to go with a new mac mini. However, it looks as though the processor in the the new imacs may be faster? Other than having a monitor, is there any other reason one would choose the new imac over the new mac mini?