When choosing the best Xiphos sword, consider key factors like blade material, weight, and craftsmanship. Opt for high-carbon or stainless steel for durability and sharpness. The blade should be double-edged and well-balanced for effective thrusting and slashing. Check the weight; it should be manageable for both speed and control. Pay attention to historical accuracy and craftsmanship if authenticity matters to you. Lastly, select a reputable maker known for quality blades to ensure you get a functional, durable Xiphos suited for your needs.