I will give some of the best treadmill which I have heard,
Kobo 2 H.P Motorized Treadmill this suits within your budget and the product information is
Manual incline (3 Levels); Speed Range: 1~14.0 km/h; DC Motor: 2 HP (Peak); Running Surface 1200 x 420 mm
Computer Functions: Speed, Hand Pulse, Time, Incline, Calories and Distance.
the next treadmill company I prefer is
Powermax Fitness TDM-100 S Motorized Treadmill and the product information is
Motor: 1.5HP; Run Belt: Multiply Polyester Satin Weave; 110kgs Maximum User Weight
0.8-12.8 kmph Display and 12 program Speed Range.
LCD display for Heat, Heart Rate, Speed, Distance and Time.
Features: Heavy duty running belt, Wheel for transportation, MP3 input and Fold-able.
Both of the them are motorized. suppose if you have less space at your home please buy the fold-able one which doesn't take much space at home.