RUI only carries research chemicals which are not DEA scheduled. All AAS are schedule 3, so even if it was legitimately for research purposes, it would still have to follow restricted protocols (ie paperwork, think prescription). You will not find a research chem site which lawfully supplies any AAS. If you want enquire further about testosterone for research purposes, you should talk to your Uncle. Use the search engine or simply read the first page of threads.
SARMS is a new chemical compound, the very first of which was derived in 2002. The medical research and even the anecdotal experiences of board members is much MUCH smaller then for testosterone or HgH. In my opinion, and think most will agree, test is the vastly superior choice. Again, read up on SARMS, there are several logs on it here. StoneCold did one about 6 months back. You haven't mentioned goals, specs, etc. For many, gH is not the solution. Do your research and give us more to work with.