Hi Mark and welcome to CS* 8-),
My advice would be to allow at least Compak K3T money (circa $600) for a grinder.
Also within budget would be a machine along the lines of a Diadema Junior Semi-auto, which eclipses all you have mentioned on finish. Build quality is superb as well.
If you find another few hundred to play with, our April Izzo Vivi/Compak K3T special is also in range. THe VBM is a gun mahcine as well.
I would encourage against more complex machines like the control at home unless there is a very good reason. More complexity = more to go wrong. It and the semi-auto (pulsar) do run pretty hot.
The new Breville Dual boiler machine is well within range and promises much.
Youre most welcome to call for a chat if youd like some pros and cons.
Happy shopping ;)