I'm seriously looking at the Garmin Nuvi 265WT. It has text to speech, Navteq traffic, bluetooth compatibility and a 4.3" screen and can be had for under $200 at Future Shop and around $140 for a refurb from Tiger Direct (which I beleive also allows a one-time download of up to date North American maps). You can check http://www.navteq.com/rdstraffic/ to see what "real-time" traffic is offered in various locations. Most of the GPS units use Navteq for their traffic, I beleive. Ottawa looks to have pretty solid coverage.

I looked at updating my father-in-law's 3 year old Garmin last summer when we were taking a road trip to Baltimore (about a 500 mile drive), but found very few loactions where the roads were different than what the unit already had. Fortunately, in those instances, it was where the state roads had been upgraded to Interstate standard in southern NY and northern PA, and I didn't need any help to follow along anyway. Glad I didn't spend the $79 or so that the update would have been.

I think text to speech is the biggest feature as well. The above mentioned unit did not have this feature, and it threw me a couple times when it would tell me to turn right in 500 feet, instead of turn right onto Main St.

Garmin is the only brand I'm looking at, although I'm sure Tomtom and Magellan also make fine units.