Just purchased the 21.5, non retina iMac with 2.7 GHZ, 1TB and 8GB Memory with Iris Pro. Wondering if i should return it for the upgrade to the fusion drive? We basically use the mac for day to day web surfing, word processing, and light gaming.
I was just in your same exact predicament and I returned mine for a Fusion drive and I am so happy I did. It is a HUGE difference, at least for me. My new machine felt no faster than the 2009 machine it was replacing. I thought this should be noticeably faster and it wasnt. Got the Fusion drive and it was like day and night. Everything happens so much faster from opening apps to getting pics off my phone. I highly recommend returning it and getting either a Fusion or a straight SSD.