VIagra. Small doses. Break the pills.
Cialis leaves you extremely tired for days after, but it does raise testosterone levels.
Benefit to risk. Have a good fuck session and then be in a hardcore snooze for days after when you should be working or functioning.
Levitra? Meh...
Everyone is different in their reactions. Viagra works fast. That's a plus. If you take Cialis and nothing happens (her) you are kind of screwed anyway.
With Viagra, you can just go hit a killer workout.