I've been using an Epson R-800. Excellent results & perfectly centered printing on the disc with surething's templates.
I use a canon i865 i lost faith in epson after going through hell with there customer service, not to mention the cost of the ink canon all the way for me
I use an epson R200 cheapest printer around for printing to media, although it is a few mm of the center you can correct that by changing the settings, for cheap inks check out ebay or search google you'd be amazed how cheap you can get it down to