CS are a great bunch of people, very very helpful. I am pretty new myself and have had a steep learning curve.
I recommend the doserless for home use. The doser on the rocky is not that crash hot, so avoid it and Ill leave my opinion at that. The MDF has problems with the doser as well... flimsy... cleaning problems etc.
Rocky is a flat burr grinder which means that you will be getting the most consistant grind apart from a full commercial conical grinder... unbelievably expensive.
Basically grinding is ultra important to the end product and in many peoples opinions maybe the most important thing to get right first.
Rockys are on the middle of the scale of the flat burr, you have mazzers and macaps up the top end in the mini commercial. Rockys are built to do the job, they have a good exterior, a good motor and they are stepless... meaning that they adjust the grinding more sensitivity allowing a far more skilled approach, so that the user is the limitation and not the machine per say. So a Rocky is an excellent choice for the budget conscious, the macap and mazzers are built to survive a bomb and will outlast all of us in a home environment... overkill many say.
So in grinding these are important things... Id support the rocky, macap and mazzer.... and think that if you have the money and want the sheebang then they are the ones that Id consider... under that get a sunbeam for $175, cause they are all the same guts.
Silva and Rocky is popular choice and you really will have a pretty good product that you will be happy with.
Talk to a sponsor, that do freight from anywhere in Aust. I am sure you can get a good deal, and as Ive come to learn paying the least for a machine will usually get you less help after sales... the sponsors here might be asking for more but youll discover why pretty soon and will be glad you payed that little bit extra.
You can also check out the coffeegeek website there is tons of info there...