So i thought i had made up my mind (made a thread in the MBP forum), but the longer I wait and more research i do, the more i am unsure. I have a mid 2011 iMac base model (2.5 GHZ and 500GB HDD). I upgraded the RAM back in 2011 or 2012 to 16GB of OWC RAM. It has been basically running nonstop since then, and is a WONDERFUL machine. Over the last year, i have added 4 external drives (3 have FW 800) since i am running out of room. I have Adobe CC and sometimes it slows down. With that said, i could have a $1500 budget to spend on a new machine - I imagine if I pay a local authorized Apple place to install 2 SSD drives (or one SSD and HDD) and spend a total of $400, my machine would run a "bit" faster than it is now, and I could get another 3 years of use. Or I could get something that is newer and has USB 3.0 and sell this one. I am not unhappy with this one at all, but it needs a storage upgrade for sure. thanks for any help. I have looked at prices for newer iMacs, but it seems that most on eBay are 8GB RAM..