I got the Rancilio Siilvia and the Rocky grinder a little over a year ago. I love both. I find the grinder to be way better than my son's Baratza Virtuoso (similar to the Starbucks grinder) although I do also believe that the Virtuoso would suffice - but the Rocky has that great solidity and is much quieter.
And I have the Rocky doserless. With it you can grind directly into whatever - portafilter basket, paper filter, any filter that is removable from the pot. So if you aren't entertaining and only pulling minimal cups you might like the doserless.