If you get a 60 series, you'll want a 60Cx.
Until the end of the year there is a $50 USD mail in rebate on all "X" series Garmin handhelds.
For purchasing, go to GPSCentral,
http://www.gpscentral.ca/When looking at prices, add in the cost of a power cord, auto mount and maps (Topo Canada is what you want). Note GPS Central sells Topo Canada $20 less if purchased with the unit.
WAAS is not required, but all units have it, so it is a moot point.
Comparing the 60Cx with the Legend Cx. The 60Cx has better reception due to the newer (better) GPS chipset (SirfIII). The 60Cx also allows for an external antenna which is handy sometimes (although not necessary).
IMO, the Venture Cx is the absolute best bang for the buck at the moment (for a handheld). It is a Legend Cx shipped without a memory card or cable. Get it and the buy the cable and card separately.
So say:
Venture Cx: $250
Mail in rebate: -$55
Topo Canada: $120
256 MB microSD card: $25
mini-B USB cable: $10
Auto mount: $30
12V power cable: $20
Invisible shield screen protector: $10
Say $410