I was told that the MTH z4000 was the best choice for smooth engine control is this correct? Buying parts before I build. All inputs welcomed.
BEGINNERMARK,
I’m guessing,you’re in O-Scale and at 460.00,dollars,It should be,Most of the guys on this forum,are N-scale and Ho- scale,you will have more luck on the CLassic Toy Trains,Forum…
Cheers,
Frank
I’m with Frank on the price point. At $460, it darn well better be good. 
I’ve heard that people like the z4000 and that it’s a solid performer. However, not personally owning one, and looking at it, I have to ask myself how much of that $460 goes to the pretty case and controls? I’m admittedly a bit of a minimalist and a pair of simple handheld PWM throttles suit my needs fine. (and is waaaay cheaper than $460).
Just my $0.02
Here is power supply of LION (Under $100.00)
Is 15 volts at 12 amps. If you need more than this, your next stop is
Rotary Converter:
600 v dc output. ROAR!
I do have to mention though, that that power supply was almost certainly way more then $100 new.
Surplus is fun, if you know what you are doing.
–Randy