Take a look at: http://store.yahoo.com/semsons-inc/index.html for lots of GPS options, bundles, etc. There are lots of combos, and build your own combos from Semsons. You can find individual items with a lower price, however, there bundles usually include a free car kit, mount, etc., and discounts on the bundle packages.
For software iGuidance and Destinator have been recommended items from GPSPassion. Mapopolis is nice to use, however, it is NOT convenient when recalcing some routes as you sometimes must use your PC for the routes (not handy at all). I use TomTom myself, however, it is can be $$$ compared to some of the other SW packages. iGuidance, Destinator, and TomTom all cover Canada.
I have used the new Globalsat BT-338 SiRF star III Bluetooth GPS (friends) and it works quite well for my application (TomTom on a Palm T3). I am sure it will work find with your A730W and Semsons has a TomTom bundle for that package, as well as iGuidance, but not Destinator.
For BT GPS on the cheap that works quite well, try the I.Trek BT GPS. $109 at Semsons. I can toss it in the back seat and still get 6 sats. Walk around with it, etc. Quite handy and excellent battery life.