I am going to order my new 5k retina iMac. I have always had a PC until now. Have a Win7 laptop but prefer a desktop and my present Windows XP one was custom built 12 years go, just had a new hard drive and screen since then so served me very well! I have an iPad and iPhone and decided next desktop will be an iMac. Then the new Retina 5K screen came out and I was blown away by it and that's the one I want. Am an older person, I do the usual bit of everything including secretary of a society and photo editing. So do you think the base i5 model should do me okay with the 512k SSD option? I will upgrade the memory myself later if necessary. The thing is I just don't want to regret not getting a higher spec model in the future as I keep my computers for a good while. Will the lower spec make much difference to how it will perform in the future? Thanks for any advice.