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If you are buying floors to enjoy them, look for quality — you can get a whole lot more quality by adding $0.50–$1.00 over the cheap laminate options.
The wear layer is super important, and I would not recommend anything under an AC4. The thickness of the floor matters as well, so try and stay in the 12mm range for durability, comfort and quiet. Better laminate has a "waterproof" claim, but note that this really means water resistant for a period — typically 72 hours submerged, or 300 hours of ponding (water sitting on top).
Good quality laminate flooring can be stunningly beautiful and almost indistinguishable from real wood, but it will cost on the higher end of the price spectrum, which is still below most engineered hardwoods. Also, if you get an AC5 or AC6 wear layer, laminate can withstand normal use and abuse for years without fail.