Just FYI moonshine, I've looked into cardio before vs. after workout and all the experts say do it after if you're trying to build muscle. I love warming up with a good run, but it's just not ideal for bodybuilding.
I can't remember all the technical jargon, but basically you're exhausting your initial reserve of sugars, etc during the first 15 minutes or so of the cardio. This leaves less energy available for lifting and decreases your muscle-building potential.
In other words, you're depleting the go-juice you need to push your muscle fibers to the next level. Putting cardio after weights maximizes fat-burning because you have to tap into fat cells for energy. Do some research and you'll probably switch up your routine.
One other thing I learned recently is to get some carbs in absolutely as soon as possible after workout (< 15min). You are catabolic immediately following wieghtlifting and in the absence of available carbs to breakdown, your body will use muscle. I bought a case of carb drink from GNC so I can pound half in between lifting & cardio and the other half after cardio.