Yes Surge is exactly what I am suggesting prior to a work out. That is if you are doing it first thing and dont have time for a meal prior and to let it settle a bit. Which it sounds you dont.
The problem you are having is the one I talked about. While milk protein,. and Casien are GREAT (Like Grow!) most parts of the day they are Not great just imediate PWO do to they slowness of their digestion. Why are they digested slow. Picture Large Curd Cottage cheese. That is what the Casien and Milk protein does in your stoch in reaction to the acids. It Curdles and that is why it is slowly digested.
Surge on the other hand in Hydro. whey. it is fast absorbed also has carbs to get you going as well. I have changed to having my Surge Prior after chatting a lot of the month with Dave Barr. On and Off. I messed with the timing and found for me it is best to slam half a serving 30 mins prior to my w/o. then the other half during my warm up. This gets the aminos in me a nice energy boost that will last the hour plus without a BAD crash befor i get more Surge or a meal PWO.
Dave suggest 15 mins. prior. I would say start there and then experiment and see what works best for you. In a sense you are doing what Surge does Prior to the w/o. Then add another Serving right after or another whiole food protein and simple carbv source and BAM you giot it going on. LOL
Spining and PWO. Well it depends on the intensity. If it is HIGH then yes a pwo type drink could do you some good. If not then I cant see the shake you said bothering you during mid-low intensity cardio and it will more then do the Job.
Hope that helps and is somewhat clear. Ignore typos.