I will happily second Tim's mention of NCE. I run a 10 amp system and find it very reliable and friendly to use.
As Tim says, the NCE wireless stuff is not legal here in the UK, I would say that's the only downside as I would occasionally like to be able to wander round the garden with throttle in hand, but the vast majority of the time I'm perfectly happy parked in a comfy chair watching trains go by and operating points etc. with just one long network cable running back into the house.
On the other hand, I've had wireless operation going using a little netbook computer running JMRI and comunicating to the NCE command station. This included loco throttles and a full diagram of the layout to operate the points. Fun, but I think real buttons are better for point control therefore I have a little control panel box using another NCE module which hooks into the DCC bus alongside the throttles.