I you are considering 4x226w peltiers, you should DEFINATELY consider phase-change lol

First, what do you want with 4x 226w pelts?

2x on CPU
1x on GPU
1x on NB

Buy a waterchiller if you are going to do this.

You will need a VERY large radiator (car size) and some strong fans.

I bought a prommy because i was considering building a dual 280w peltier rig.

2x 280w peltier (€45 a piece)
2x 500w 24v psu (home made, even then they cost €75 a piece)
1x akasa copperking p4 CPU heatsink => 60x45x80mm copper fins out of 1 piece of copper (to make a large waterblock to get rid of 1100w of heat)
-A couple of very large radiators (2x triple 120mm fan radiators on top of each other)

All together: about 300 - 350 euro
And then the electric bill.....

Aim: -10 full stress

Then, i saw a prommy mach1 for 450 euro, so my choice was simple.

Peltiers are cool that for sure. But they have limitations ^_^