$200 a month? Ouch. I would stick to injections, but I can see lack of interest in injecting every week for the rest of your days, but that gel sounds realy expensive.
Your heavy hands cardio sounds hard on the joints even for me at 27, for some reason I never liked the idea of such a thing.
I dont know much about the legal supplements but they seem to work well for those 30-35 and over, when I was 25 I considered it a waste of money. Some people are not giving MAG 10 great reports though, so ask in the supplement forum for suggestions on that one.
If your going to be doing test though, you wont need any of that.
I would wait 4-6 weeks or so for a re-test IMO.