Looking at Best Buy, they have a base mac mini for $499 or even the $699 model. Is this a wise decision to replace an HP Pavillion machine 500 series? My autistic brothers machine is so slow, even after a fresh install and SSD upgrade. I think it's just the processor can't handle it well. I want to move him to Apple so he stops having all these issues. I thought about an IMAC which is my limit $1000. But you really can't upgrade that easy. So I would think the Mac Mini and upgrade to SSD would work? Thoughts, concerns?