Mid 2010 iMac 27inch Issues?

I've been using a 2010 27 inch for the last 5 1/2 years...it's a great machine. There was a recall on certain Seagate 1TB drives which were prone to failure, so you may want to determine if that's a potential issue. That being said, I'd highly recommend installing an SSD anyway, and adding more memory. RAM is user upgradable, but you will have to take the machine apart (or pay to have this done) to install an SSD. Plenty of guides on how to do this.

 

+1 I bought a new 27 mid 2010 model in August 2011 new. Mine was the 2.93 GHz I7 model with 1TB HHD and 12 GB RAM. I used it primarily with Lightroom as well as some light video processing. It was a terrific iMac. I just upgraded to a 27 inch late 2015 model and sold the 2010 (for $900).

The nice thing about this model is: it's very easy to open it up and either install an extra SSD or replace the HHD with an SSD. I added an extra SSD via the instructions in the video link below. Very easy.

A few things to note: Keep in mind the USB ports are 2.0 so if you use a lot of external storage via USB will be a bit slow. I think the processors between mine and the one you're considering we're quite different (i7 Lynnfield vs i3 Clarksdale)....as are the graphics cards. So, you might want to consider you're intended use to make sure the processor and graphics are up to the task. For light everyday type use, I can't imagine the one you are considering would be an issue. I had no problems with mine whatsoever other than a HHD issue. Mine fell under the Seagate HHD recall and Apple replaced the drive for free.