I currently have 4 MTH PS3 GP40's that I run under DCC. Back when I was in 3-rail I used to run DCS and I have to say that PS3 locomotives under DCC run just as well as they do with DCS. Other than no proto-couplers, DCC activates all of the features that DCS does. I prefer DCC over DCS because there are no annoying "Check Track" or "Engine Not Found" messages.
I have an NCE PH10R which is the wireless command set which includes a 10 amp booster. When I build my layout next year I will get another 10 amp booster and "Brutus" power supply - 2 boosters/2 loops, 1 command station.