I am replacing a Cafe Roma (been a good entry level machine for a couple of years) and am looking at the Ikon. *Im no expert, but from my searching, I know the Ikon model is a) discontinued and therefore may be getting harder to locate, and b) a boiler type machine. *The 800 series (and Cafe Roma, I believe) are Thermoblock machines. *I would assume this would be a key functional point of difference. *Cant answer exactly what the pros/cons of each style is, but I get the distinct impression that having the boiler is a plus!