These top quality treadmills for home use are price $3000 and up. Expect solid construction, good warranties and lots of extras. The following were recommended by various sources in my research
1. Landice L8 Treadmill
The Landice L8 LTD Series Treadmill gives you a larger belt for more movement. Features a powerful 3 horsepower motor driving a 4-ply belt over a 63 in x 20 in running surface can hit speeds up to 11 miles per hour and inclines of 15 percent. Computer animated workouts and info screens guide you through manual, fatburn, intermediate, advanced and interval workouts.
2. Landice L7 Treadmill
The Landice L7 Executive Trainer and the L7 Cardio Trainer both score well with Monster Ratings and with Treadmilldoctor.com. The Baldor 3 HP continuous duty motor is one of the most powerful. The computer animated display and other features are unique.3. Smooth 9.25X Treadmill
Extra long 20" x 62" treadbelt, with 6" straddle pads. Motor 3 HP continuous duty. This heavyweight treadmill, weighing 304 pounds, gives exceptional stability. User weight limit 400 pounds. Has 12 preset workouts, three custom. Comes with free heart rate monitor. Speaker system plugs into TV or audio and directs it to your ears.