Do you want only a printer, or a machine that makes the actual copies as well as then prints on them? Or a regular paper document printer that can also print on disks for occasional use?
Do you want thermal printing or inkjet?
Thermals are fast, and don’t smudge if your disc gets moist or is handled by wet fingers, but IMO inkjets have better color reproduction, particularly for photos of people and the like, and the ink is cheaper than the thermal colors. The cost per unit is always a moving target.
Think about ink: a ribbon-based machine or a single-cartridge ink tank machine means if the design for a disk is heavy in one color, that color runs out first and you throw away an ink cartridge or ribbon that may still be half full. Multi-tank inks, where you can replace just the short one of 3 or 4 colors, are a better value long term. If you stick to mostly B&W, or leave a lot of white space in the disc label design, you save even more.
Both formats require dedicated blank media: you can’t print inkjet on thermal stock at all, and thermal printing on inkjet disks doesn’t work very well. The blanks look identical except inkjets are slightly matte-finished, and thermals are more shiny.
We do both kinds at our shop, for small runs of 1-50 at a time, we really like the Bravo Primero Pro inkjet duplicator/printer: it has a small footprint, runs well with a PC or a mac, is pretty fast for a two-drive machine, good price. Rimage and Microboards are similar competitors. For runs of more than a hundred, we tend to use a dedicated self-contained Microboards tower replicator (no PC hookup required) with 10 drives and a stand-alone robotic thermal printer from Rimage with a rotating tray that can thermal print 200 at a time. The Microboards tower is blazing fast, the down side is every eight minutes or so you have to empty and re-feed it by hand. The Bravo is much slower by comparison and needs a computer hooked into it, but you can set it and forget it for as long as it takes to make 50 copies and go edit or do something else productive.
The accuracy of color between RGB video and CMYK print is always a gamble: one is additive color, the other, subtrractive and usually you’re in the ball park for color using white coated disks, but if your clients demand pantone-digit-level color accuracy, you’ll have to do some test runs and adjust color settings in the printer or in the images while in photoshop to compensate for what the printer output looks like.
Some HP and Lexmark document printers have trays that allow you to run CD’s and DVD’s thru the printer as if they were single sheets of paper. This may be okay of you only do one or two disks a week, but I would never suggest it for more than that.
I think it’s the Dymo people that make a tiny thermal printer that only makes a tiny B&W label on disks as you slide them thru like a credit card. About $50 at an office supply store. Not really for distribution use but for neatness when making in-house archives and you want something better than a sharpie pen.
Never use stick-on labels on DVD’s or CD’s, that was never a good idea.