Alrighty here we go. Just to let you know, I get up at 4:15 AM and get to my local gym at about 5:00AM. This is how i work out, mon-sat. There are MANY advantages to working out in the AM. If you can get yourself up and moving you have ALOT more energy than you would think you do. And instead of waking up to go to work, you get to look foreward to going to the gym and getting that godly pump. Now, on to your question.
I do not do cardio in the morning, but my workout partner does. He has found, what works best for him, that if you get a hard pump and go home and do seomthing else like to eat, planning to come back and do cardio is really difficult. After that AM workout sometimes you will feel drained, but sometimes you will feel great! If I were you I would continue your regular routine workout, dont change anything about that except maybe if you completely drain yourself in the workout to not (save a little energy). As for the cardio, I would take a small break, 10-15 minutes, to help recooperate some, and then do your cardio. If you feel comfortable take an ECA or carb-up shake and wait until it kicks in to give you that little extra UMPF. I've given various people advice on the AM workout and they are enjoying it. Let us know how you like it if you choose to do this!
Chris
(PS. Karma Plz?)