Looking to revamp my tank. Any advice?

[Xyres]

I am thinking of first of all getting a new tank as mine is a little old. I am looking at between a 55 like my current or something a little bigger like a 77. Right now Like I said I am running a 55 with radion gen 1 lights (Are we able to upgrade these yet?) mp40 pump, reef octopus HoB skimmer and a 305 canister filter.

My tank has been going really well but I am looking for something to make my life a little easier like the TLF phosban reactors, maybe getting rid of the 305 for something a little better. Also how hard would it be to track down a 55 gal aquarium with a sump? I haven't had any luck and have no idea where to get one built.