My 2009 Mac Pro (4,1) 2.66 GHz 8 core has served me very well over the years. My main use is Final Cut Pro X, Logic Pro, and Lightroom/Photoshop, hobby use only. I debated getting a new computer, but really my only complaint with the current was the slow boot up , file access times and slow app launching. The processors are still decent IMO and it's an 8 core so I wanted to look into perhaps an upgrade rather than replace and spend a few thousand dollars. Having heard about the difference an SSD can make in an older machine, I took the plunge and installed 2 x 1 TB Crucial MX200s using 2 x Apricorn Solo X2 cards I bought from Amazon. Installation was a snap and I really cannot believe the difference it has made in the machine. The boot time is so fast now. Black Magic Disk Speed Test reports approx. 480 Read and Write speeds compared to the ~72 I was getting with the spinning drives. All of my apps launch almost instantly now. I'm just not used to that kind of speed. Wow! It really feels like a brand new machine again. I still kept 2 spinning drives, Western Digital Caviar Black 1 TBs mounted in the SATA bays for less used files and storage. The "cheese grater" Mac Pro is still so impressive. Such quality construction and design. They're built like a tank and I really wish Apple had continued making them.