Cannondales have crappy frames. They earned the nickname "CrackN'Fail" for a reason.
Two really nice options: The Gary Fisher Tassajara
http://fisherbikes.com/bikes/bike_detail.a...&bike=Tassajara
sells for 600$ This is a real mountain bike, that is at home on the trail as well as in the city.
Also, if you're looking for something super fast, but not a road bike, try the Trek 7500FX.
http://www2.trekbikes.com/Bikes/City_Bike_...00_FX/index.php
It is also 600$ It uses 700cm road wheels and removes the front shock in order to make it lighter and faster. The trade off is that you lose some of the cushyness of a bike that has a front suspension. The benefit is that it is crazy fast.
There is also a nice comfort hybrid, the Navigator 300. It sells for 420$ and is designed to be super comfortable. Trade off is that it is a slower bike. It is still a quality bike, with some really nice touches such as built-in lights in the seat and peddles, as well as a suspension seat to reduce saddle sorness after riding.
You really can't go wrong with any of the big three bike companies: Trek, Giant, or Specialized. Don't spend less than 400$ Car racks will run you around 100$ When shopping for a bike ask what type of service is included(our shop gives free lifetime adjustments on the brakes and shifters), if the wheel have double wall rims (singlewall rims suck) and make sure that they are giving you a bike that fits you, not just what they have on the floor.
P.S. dept store bikes are the devil.