M2 carefully curates glass, porcelain and stone tile from Asia, Brazil and Europe. Its big, bright and unpretentious showroom is like a gallery, complete with a sample area and coffee kiosk. All its lines are on hand, including extensive porcelain tiling that replicates concrete, marble and wood planks. The new Spanish Opal series brings high-gloss hues and subtle patterning to classic subway tile. This one-stop shop even provides a compact Home Depot-like area offering installation materials and advice.