Glad to see we have you tempted to spend your money! ;) Keep the boiler full, ESPECIALLY if you are keeping her on a timer. Get into the habit of refilling the boiler every single time if you are steaming. Its not really an issue if you are just pulling shots.
As for the grinder, we upgraded from a little Russell Hobbs bur grinder to a Solis 166 when we got our silvia and we were sorry that we didnt just put that money toward a rocky sooner, we wouldve saved ourselves $195, both grinders went to good homes though.