Sound and pictures True PS700: Full-featured treadmill with built-in TV and MP3 jack. Likes: Good variety of standard programs. Solid feel with thick, shock-absorbing, 22-inch by 60-inch orthopedic belt; maximum speed and elevation of 12 mph and 15%. Dislikes: TV does not include DVD player. Instant-response speed buttons jump from 2 mph to 5 mph to 8, 10, 12 mph, excluding popular 4 mph and 6 mph speeds. Price: $3,199. (800) 426-6570; truefitness.com. If you prefer, listen to music Spirit XT600: Value-packed, fold-up tread with an MP3 input jack and speakers. Likes: Loaded with user-friendly features. Has 10 programs, two fans, easy-access speed and elevation controls on the arms. Instant-response speed keys with a maximum speed of 12 mph (even numbers only) allow interval training. Maximum elevation of 15%. Belt is 20 inches by 58 inches. Solid feel with space-saving convenience of a fold-up. Dislikes: Data readout numbers a bit small. Price: $2,099. (800) 258-4555; spiritfitness.com.
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