Hello to all and a GPS Question

First off hello to everyone here, this my first post and obviously I'm new to the board. I'm up in Canada between Buffalo, NY and Toronto, ON.
I have been driving for around a year now and have been using a TomTom Go for navigation help. It has worked well, sometimes directing to wrong turns, etc. It was not designed for a trucking application and that is well know.
I'm in the market for a "trucker" GPS and thanks to the many threads and info here I have narrowed to either the PC Miler Navigator or the GY500. The extra bells and whistles don't interest me that much, I'm buying it primarly for the truck routes.
Any feed back, opinions, likes or dislikes between these two units would be greatly appreciated.
Thanks in advance,
Al