The pin2dmd is in my mind a great display. It is not perfect, but as its less than half the price of a colordmd its not half the quality.
Also if you do not want to buy a pin2dmd you can build one yourself for under £100.
The latest firmware (3.11) makes colourising on real pins run smoother as well. They are impoving it all the time. In fact I prefer the Pin2dmd version of
AFM to the colordmd one. It is all personal opinion I know.
On power supply - the pin2dmd and colordmd (LED) require the same amount of power as they use the SAME PANELS. I have not had to run a PSU into any real pin I have fitted one. Can fit one in minutes.
Also the files are not free for SS (or most other pins) - I have a lot of them that I have paid for and you can not publicaly share them out of 'respect ot the authors'. Strange thing is they give the Visual Pinball files away for free - work that out!? As a plus to colordmd you can download what you want for free (as they make the money on the display see next point)......
Colordmds are HIGHLY EXPENSIVE and someone is making SHED LOADS off them - its a cheap LCD screen or £50 worth of RGB panels - with some custom brackets and one small PCB that must get made for £30 in china. All colordmd colourisation is outsourced and these guys get the odd 'free display' for doing the projects.
For a SHORT time a colordmd-pin2dmd file conversion was around on one of the sites but got pulled down in hours. I would love to get hold of that.
It is an old debate this - but colordmd is easier in some respects, but with the new pin2dmd evo boards - it is not rocket science.