I am a big fan of the PH-180 bricks and use them for all track power on my layout. I have them running through my TIU channels to MTH terminal blocks, from there out to all track blocks. I connected Legacy to all the TIU output commons. It's worked quite well for over 6 years now. The PH-180s give you the most bang for the buck and arguably, have the best breakers of any power supplies available for use with our trains. So, IMO, I would definitely say you have the correct power supplies.