The top 10 best chess rollup boards include 3 sets from WE Games, 1 from Wholesale Chess Archer, 1 from the House of Staunton, 1 from Pitkin Stearns International, 1 from Yellow Mountain Imports, 1 from Club Vinyl, and 1 from Wholesale Chess.
Green and white, as standardized by some chess federations, works very well though it is not mandatory. Red and black is another popular choice but this color combination seems to cause some people headaches, perhaps due to color blindness issues. The best chess board color combination for you is one that you’re happy to play on!
Chess clocks are so expensive because there aren’t many manufacturers and the demand is relatively low and stable. Consumers (chess players) aren’t buying that many chess clocks in one lifetime.