Cannondale Bad Boy Calgary What's The Best Urban Commuter & Weekend Warrior Bike That's Tough, Light, Fast, And Under $800?

What's the best urban commuter & weekend warrior bike that's tough, light, fast, and under $800? - cannondale bad boy calgary

I want a good urban commuter bike, the durable, lightweight and fast.

What is best for your money?

So far I've tried the following:

1). Trek 7.5 - Nice clean looking fast bike light. Uncomfortable seats. Ride very balanced.
Trek 7.5 FX
http://www.trekbikes.com/us/en/bikes/2008/bike_path/fx/75fx/

2.) Cannondale Bad Boy - best looking bike. A little slower. The most expensive of the group of bikes - on my budget.
http://www.cannondale.com/bikes/04/ce/model-4MRBB.html

3.) K2 Astral - Very easy and fast motorcycle. You do not know how difficult it is. The color red sucks.
http://www.k2bikes.com/index.php?brand=K2&series=ROAD&type=FLAT% 20bar% 20Road & model = 203.0% ASTRAL

4.) Specialized Sirrus. - Cool look minimal. Very mild. You go. Cheaper bikes.
http://www.specialized.com/bc/SBCBkModel.jsp?sid=07Sirrus

Under these bikes I leaned over to the Trek 7.5.

What are the best frame and components, is it?

Are there other bikes I do?