Nice list bro..shd see a nice nano reef tank coming up soon..
imho, ur light is powerful enough to keep sps liao..for return pump, there are many good brand to choose from..I feel that u need to get a min 1000lph pump as to run ur chiller under ur tank then up (choose those pump that can set different flow rates de)..for biomedia, u can choose too (marinepure sphere, siporax, biohomme, bacteria king, etc..)..small tank dun need a lot yea ..u wont need those chemical filtration ba..weekly wc shd replenish those depleted elements ba..if need to, can dose those supplements too..cheers n happy reefing