There are many proven designs of sump but if you want the best, its all up to you if you can maintain it at its best. There is no maintainance free sump or so call best sump. There is only responsible reefer or irresponsible reefer.
Have you check out this section
http://www.sgreefclub.com/forum/index.php?showforum=6
You might get some idea there or can view members showcases