I love my epoxy floor, but it's a granite look not checkerboard - next time ! How did the checkerboard epoxy come out, James A ? The company that did my floor told me they could do it, but they kind of discouraged it, saying the extra down-time involved and expense, etc. etc. BTW I agree the Griot's quartz tile looks awesome, but the pricing is very high, and also it's very shiny stuff so must be very slippery when wet.
To answer the initial question, I would look around for commercial grade tile, like they use in supermarkets, for a garage application. These usually come in larger sizes as well (18 by 18, 24 by 24), which generally look better on a decent-sized garage floor. A friend of mine did this and loved it. Whatever you get be sure the color (black, white, whatever) is solid throughout the tile, because your tires will bring in rocks etc, that will scratch the tile.