I run a lot of my Lionel PW, along with modern such as MTH PS1, PS2, PS3 and Williams, K Line, Atlas, etc. As for the control system, I only use TMCC and therefore have a couple ZWCs with 180 and 135 bricks, and the attached meters. I also have, and use to some extent, PW ZWs, VW, KW, TW, a 1946 Z, etc. I do prefer the ZWC with 180 bricks/meter bridge. I can run all my engines (conventional and Command Control, all makes) very well, and have no problems. No, I have not gotten any Legacy engines, yet. But, with the fairly large number of motive power I have, I may not.
So, I recommend the ZWC with 180 bricks for power output, expandability (from 135 bricks), runs all makes very well, and can be acquired for a lower cost than others at present. If they do not work out for what you wish, can be used for accessories, smaller layout/separate powered yard, etc.
Jesse TCA 12-68275