i think Flip gave you some great advice there.... in all likelihood, getting your "T" levels up to normal/high-normal should prolly be your first priority.
i've used Ostarine, and while i had moderate gains in strength, endurance and "pump," it does screw with your HPTA and requires a PCT (as do all the SARMs). i might try LGD4033 down the road, as it has been shown to be a little stronger than Ostarine.
personally, i'd stay away from S4, as i'v read that the vision issues are due to it's toxicity, so that's not a good thing...
i recently used Clomid to bring my testosterone levels up (due to some health issues and an extended layoff) and it worked pretty well. however, even though i went from 280 to 890, it wasn't mind-blowing. from what i've read, the estrogen-like effects of the SERM is what minimizes some of the well-being. it also decreases IGF-1 a bit and raises SHBG.