Agree with all of Ed's comments above, particularly concerning the robustness and upgradeability of the NCE hardware. It definitely has an industrial strength feel and performance to it.
Expanding on the DCC breaker option a bit (which completely slipped my mind in my earlier post) this is a great way to create multiple power districts powered by a single booster. Better and much cheaper, really, if you're not actually limited by the booster power.
I use the same breakers Ed mentioned, the DCC Specialties Powershield PSX1 breaker. I get mine from Tonys Trains for about $40, so they're pretty economical. It has a configurable trip voltage, so you can tailor it to the specific needs of the power district it's driving. The trip and reset behavior in my experience is quite a bit gentler to engines than the booster reset. It is addressable as a standard DCC accessory decoder, so you have remote on/off control of every power district from your cab. I found this to be a surprisingly useful feature when I first started using them, making it really easy to power on blocks of accessories, turn off idle passenger cars in a siding, and so on.
The reset behavior is configurable as well. The auto reset as Ed describes is one option, and in fact has an adjustable retry delay as I recall. Another option, which is what I use, is a manual reset. This allows me to go find and fix whatever happened, without the breaker (or booster, if you don't use a breaker) continually trying to power up and tripping again. Then once I unpile the cars 
I can turn the power back on manually with a command from the remote.
