As long as you have legit products, adex will help with estrogen related side effects. I would do a search and further reading though because aromasin is superior to adex in my opinion. What do you have planned for PCT?
I don't mind the stack but would make a few tweaks. I would swap in GW in place of the SR. It is just easier to dose and will accomplish what you are looking for. I would also cut it down to 12 weeks. SARMs are more mild than steroids but still suppressive so you want to give yourself the best...
I agree with mobster. I think you have a lot of natural muscle to put on at your size. Save the PEDs. You probably have a lot of work on diet and training but that will get you the gains!