I currently use my Mac mini along with my HDTV as a monitor although I'm moving soon and being that I have to share with a roommate, I can't use the computer if he is using the TV so I may just settle for an iMac.
If I go from mini to iMac (and I won't rule it out), I don't want an i3. To me if Apple is going to get away with charging $1,299 for the base 21.5" iMac they have now, it needs a 256 GB PCIe SSD at minimum as well. Iris is fine though Iris Pro would be better.
Otherwise give me a new mini with a i5-4200M for $599 (better for it to be $499) and if they want go for the usual 500 GB HDD with a $200 option for a PCIe SSD.