We just had Stainmaster groutable vinyl tile installed, it is manufactured by Mannington and there are several Mannington pattterns also. Others on the board swear by the Konecto vinyl time products saying the better/best of these are even heavier duty than the Mannington/Stainmaster products.
The installer who did our Stainmaster vinyl tile had nothing good so say about the Duraceramic products. He said the wear layer will completely separate from the tile.
Maybe this only happens if the 16x16 tiles are broken apart into four 8x8 tiles (which sounds like a bad idea from the get-go to me). He said the Duraceramic has earned a bad reputation with local installers, whereas he has not had a single call-back on a Stainmaster/Mannington job in the three years he has been installing this product.
I know this is mostly hear-say, but ask around and get as many opinions as possible.
p.s. - My wife completely removed the previous sheet vinyl and luan underlayment by herself while I was at work! Score heavily into 3ft x 3ft squares, then pry off the floor using a floor scraper and/or Wonder Bar. The luan will snap on the score lines giving you easy to handle pieces for disposal.