Bigblock, this picture is concerning to me. I'm sure it can support the tank for some time, but the risk of the cabinet tipping over is concerning.
I'm with you on the peace of mind, but I think in a tank this size, and how perfectly the size matches the furniture, the centre brace probably isn't a huge deal.What concerns me is the lack of center support. You'd basically be putting close to over 200lbs on that thing. Is it solid wood or particle board? I'd opt to put the 20h in place of the movies and the 20l in the hallway. Much safe in my opinion. I am neurotic when it comes to stands for my tank and only use solid wood furniture or build my own stands. The stand I built for my 55g could easily support several times its weight, but peace of mind is always nice to have.